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Yan Y, Li M, Ding Z, Yang J, Xie Z, Ye X, Tie W, Tao X, Chen G, Huo K, Ma J, Ye J, Hu W. The regulation mechanism of ethephon-mediated delaying of postharvest physiological deterioration in cassava storage roots based on quantitative acetylproteomes analysis. Food Chem 2024; 458:140252. [PMID: 38964113 DOI: 10.1016/j.foodchem.2024.140252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 06/05/2024] [Accepted: 06/25/2024] [Indexed: 07/06/2024]
Abstract
Ethylene plays diverse roles in post-harvest processes of horticultural crops. However, its impact and regulation mechanism on the postharvest physiological deterioration (PPD) of cassava storage roots is unknown. In this study, a notable delay in PPD of cassava storage roots was observed when ethephon was utilized as an ethylene source. Physiological analyses and quantitative acetylproteomes were employed to investigate the regulation mechanism regulating cassava PPD under ethephon treatment. Ethephon was found to enhance the reactive oxygen species (ROS) scavenging system, resulting in a significant decrease in H2O2 and malondialdehyde (MDA) content. The comprehensive acetylome analysis identified 12,095 acetylation sites on 4403 proteins. Subsequent analysis demonstrated that ethephon can regulate the acetylation levels of antioxidant enzymes and members of the energy metabolism pathways. In summary, ethephon could enhance the antioxidant properties and regulate energy metabolism pathways, leading to the delayed PPD of cassava.
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Affiliation(s)
- Yan Yan
- National Key Laboratory for Tropical Crop Breeding, Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya 572025, China
| | - Meiying Li
- National Key Laboratory for Tropical Crop Breeding, Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya 572025, China
| | - Zehong Ding
- National Key Laboratory for Tropical Crop Breeding, Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya 572025, China
| | - Jinghao Yang
- National Key Laboratory for Tropical Crop Breeding, Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Zhengnan Xie
- National Key Laboratory for Tropical Crop Breeding, Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Xiaoxue Ye
- National Key Laboratory for Tropical Crop Breeding, Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya 572025, China
| | - Weiwei Tie
- National Key Laboratory for Tropical Crop Breeding, Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya 572025, China
| | - Xiangru Tao
- National Key Laboratory for Tropical Crop Breeding, Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Ganlu Chen
- National Key Laboratory for Tropical Crop Breeding, Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Kaisen Huo
- Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya 572025, China
| | - Jianxiang Ma
- Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya 572025, China
| | - Jianqiu Ye
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Wei Hu
- National Key Laboratory for Tropical Crop Breeding, Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya 572025, China; Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang 571339, China.
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Drapal M, Ovalle Rivera TM, Luna Meléndez JL, Perez-Fons L, Tran T, Dufour D, Becerra Lopez-Lavalle LA, Fraser PD. Biochemical characterisation of a cassava (Manihot esculenta crantz) diversity panel for post-harvest physiological deterioration; metabolite involvement and environmental influence. JOURNAL OF PLANT PHYSIOLOGY 2024; 301:154303. [PMID: 38959754 DOI: 10.1016/j.jplph.2024.154303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Revised: 06/19/2024] [Accepted: 06/25/2024] [Indexed: 07/05/2024]
Abstract
Cassava (Manihot esculenta Crantz) produces edible roots, a major carbohydrate source feeding more than 800 million people in Africa, Latin America, Oceania and Asia. Post-harvest physiological deterioration (PPD) renders harvested cassava roots unpalatable and unmarketable. Decades of research on PPD have elucidated several genetic, enzymatic and metabolic processes involved. Breeding populations were established to enable verification of robust biomarkers for PPD resistance. For comparison, these PPD populations have been cultivated concurrently with diversity population for carotenoid (β-carotene) content. Results highlighted a significant variation of the chemotypes due to environmental factors. Less than 3% of the detected molecular features showed consistent trends between the two harvest years and were putatively identified as phenylpropanoid derived compounds (e.g. caffeoyl rutinoside). The data corroborated that ∼20 μg β-carotene/g DW can reduced the PPD response of the cassava roots to a score of ∼1. Correlation analysis showed a significant correlation of β-carotene content at harvest to PPD response (R2 -0.55). However, the decrease of β-carotene over storage was not significantly correlated to initial content or PPD response. Volatile analysis observed changes of apocarotenoids derived from β-carotene, lipid oxidation products (alkanes, alcohols and carbonyls and esters) and terpenes. The majority of these volatiles (>90%) showed no significant correlation to β-carotene or PPD. Observed data indicated an increase (∼2-fold) of alkanes in varieties with β-carotene >10 μg/g DW and a decrease (∼60%) in varieties with less β-carotene. Fatty acid methyl esters with a chain length > C9 were detected solely after storage and show lower levels in varieties with higher β-carotene content. In combination with correlation values to PPD (R2 ∼0.3; P-value >0.05), the data indicated a more efficient ROS quenching mechanism in PPD resistant varieties.
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Affiliation(s)
- Margit Drapal
- School of Biological Sciences, Royal Holloway, University of London, Egham Hill, Egham, Surrey, TW20 0EX, UK
| | | | | | - Laura Perez-Fons
- School of Biological Sciences, Royal Holloway, University of London, Egham Hill, Egham, Surrey, TW20 0EX, UK
| | - Thierry Tran
- International Center for Tropical Agriculture (CIAT), Cali, Colombia
| | - Dominique Dufour
- International Center for Tropical Agriculture (CIAT), Cali, Colombia; CIRAD, UMR QualiSud, F-34398, Montpellier, France; Qualisud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, IRD, Université de La Réunion, Montpellier, France
| | | | - Paul D Fraser
- School of Biological Sciences, Royal Holloway, University of London, Egham Hill, Egham, Surrey, TW20 0EX, UK.
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Gu J, Ma X, Ma Q, Xia Z, Lin Y, Yuan J, Li Y, Li C, Chen Y, Wang W, Zhang P, Wang ZY. RNA splicing modulates the postharvest physiological deterioration of cassava storage root. PLANT PHYSIOLOGY 2024; 196:461-478. [PMID: 38635971 DOI: 10.1093/plphys/kiae206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/01/2024] [Accepted: 03/20/2024] [Indexed: 04/20/2024]
Abstract
Rapid postharvest physiological deterioration (PPD) of cassava (Manihot esculenta Crantz) storage roots is a major constraint that limits the potential of this plant as a food and industrial crop. Extensive studies have been performed to explore the regulatory mechanisms underlying the PPD processes in cassava to understand their molecular and physiological responses. However, the exceptional functional versatility of alternative splicing (AS) remains to be explored during the PPD process in cassava. Here, we identified several aberrantly spliced genes during the early PPD stage. An in-depth analysis of AS revealed that the abscisic acid (ABA) biosynthesis pathway might serve as an additional molecular layer in attenuating the onset of PPD. Exogenous ABA application alleviated PPD symptoms through maintaining ROS generation and scavenging. Interestingly, the intron retention transcript of MeABA1 (ABA DEFICIENT 1) was highly correlated with PPD symptoms in cassava storage roots. RNA yeast 3-hybrid and RNA immunoprecipitation (RIP) assays showed that the serine/arginine-rich protein MeSCL33 (SC35-like splicing factor 33) binds to the precursor mRNA of MeABA1. Importantly, overexpressing MeSCL33 in cassava conferred improved PPD resistance by manipulating the AS and expression levels of MeABA1 and then modulating the endogenous ABA levels in cassava storage roots. Our results uncovered the pivotal role of the ABA biosynthesis pathway and RNA splicing in regulating cassava PPD resistance and proposed the essential roles of MeSCL33 for conferring PPD resistance, broadening our understanding of SR proteins in cassava development and stress responses.
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Affiliation(s)
- Jinbao Gu
- Guangdong Academy of Sciences, Institute of Nanfan & Seed Industry, Guangzhou 510316, China
- Zhanjiang Research Center, Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Zhanjiang 524300, China
| | - Xiaowen Ma
- Guangdong Academy of Sciences, Institute of Nanfan & Seed Industry, Guangzhou 510316, China
| | - Qiuxiang Ma
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Science, Shanghai 200032, China
| | - Zhiqiang Xia
- Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
| | - Yan Lin
- Guangdong Academy of Sciences, Institute of Nanfan & Seed Industry, Guangzhou 510316, China
| | - Jianbo Yuan
- Guangdong Academy of Sciences, Institute of Nanfan & Seed Industry, Guangzhou 510316, China
| | - Yang Li
- Guangdong Academy of Sciences, Institute of Nanfan & Seed Industry, Guangzhou 510316, China
- Zhanjiang Research Center, Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Zhanjiang 524300, China
| | - Cong Li
- Guangdong Academy of Sciences, Institute of Nanfan & Seed Industry, Guangzhou 510316, China
- Zhanjiang Research Center, Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Zhanjiang 524300, China
| | - Yanhang Chen
- Guangdong Academy of Sciences, Institute of Nanfan & Seed Industry, Guangzhou 510316, China
- Zhanjiang Research Center, Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Zhanjiang 524300, China
| | - Wenquan Wang
- College of Tropical Agriculture and Forest, Hainan University, Haikou 570228, China
| | - Peng Zhang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Science, Shanghai 200032, China
| | - Zhen-Yu Wang
- Guangdong Academy of Sciences, Institute of Nanfan & Seed Industry, Guangzhou 510316, China
- Zhanjiang Research Center, Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Zhanjiang 524300, China
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4
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Tang Y, Yan C, Li H, Ma X, Li J, Chi X, Liu Z. Proline inhibits postharvest physiological deterioration of cassava by improving antioxidant capacity. PHYTOCHEMISTRY 2024; 224:114143. [PMID: 38762153 DOI: 10.1016/j.phytochem.2024.114143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Revised: 05/10/2024] [Accepted: 05/12/2024] [Indexed: 05/20/2024]
Abstract
Cassava (Manihot esculenta Crantz), a crucial global tuber crop, encounters significant economic losses attributed to postharvest physiological deterioration (PPD). The PPD phenomenon in cassava is closely related to the accumulation of reactive oxygen species (ROS), and amino acids play a pivotal role in regulating signaling pathways and eliminating ROS. In this study, the storage performance of eight cassava varieties were conducted. Cassava cultivar SC5 showed the best storage performance among the eight cassava varieties, but the edible cassava cultivar SC9 performed much worse. Comparative analysis of free amino acids was conducted in eight cassava varieties, revealing changes in proline, aspartic acid, histidine, glutamic acid, threonine, and serine. Exogenous supplementation of these six amino acids was performed to inhibit PPD of SC9. Proline was confirmed as the key amino acid for inhibiting PPD. Treatment with optimal exogenous proline of 5 g/L resulted in a 17.9% decrease in the deterioration rate compared to untreated cassava. Accompanied by a decrease in H2O2 content and an increase in catalase, superoxide dismutase and ascorbate peroxidase activity. Proline treatment proved to be an effective approach to alleviate cell oxidative damage, inhibit PPD in cassava, and prolong shelf life.
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Affiliation(s)
- Yanqiong Tang
- School of Life and Health Sciences, Hainan University, Haikou, 570228, China
| | - Chengliang Yan
- School of Life and Health Sciences, Hainan University, Haikou, 570228, China
| | - Hong Li
- School of Life and Health Sciences, Hainan University, Haikou, 570228, China
| | - Xiang Ma
- School of Life and Health Sciences, Hainan University, Haikou, 570228, China
| | - Juanjuan Li
- School of Life and Health Sciences, Hainan University, Haikou, 570228, China
| | - Xue Chi
- School of Life and Health Sciences, Hainan University, Haikou, 570228, China.
| | - Zhu Liu
- School of Life and Health Sciences, Hainan University, Haikou, 570228, China.
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5
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Mao JC, Yan M, Li JH, Yang JY, Wang HJ. The role of small RNAs in resistant melon cultivar against Phelipanche aegyptiaca parasitization. Front Microbiol 2024; 15:1408926. [PMID: 38774502 PMCID: PMC11106454 DOI: 10.3389/fmicb.2024.1408926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Accepted: 04/22/2024] [Indexed: 05/24/2024] Open
Abstract
Bidirectional trans-kingdom RNA silencing, a pivotal factor in plant-pathogen interactions, remains less explored in plant host-parasite dynamics. Here, using small RNA sequencing in melon root systems, we investigated microRNA (miRNA) expression variation in resistant and susceptible cultivars pre-and post-infection by the parasitic plant, broomrape. This approach revealed 979 known miRNAs and 110 novel miRNAs across 110 families. When comparing susceptible (F0) and resistant (R0) melon lines with broomrape infection (F25 and R25), 39 significantly differentially expressed miRNAs were observed in F25 vs. F0, 35 in R25 vs. R0, and 5 in R25 vs. F25. Notably, two miRNAs consistently exhibited differential expression across all comparisons, targeting genes linked to plant disease resistance. This suggests their pivotal role in melon's defense against broomrape. The target genes of these miRNAs were confirmed via degradome sequencing and validated by qRT-PCR, ensuring reliable sequencing outcomes. GO and KEGG analyses shed light on the molecular functions and pathways of these differential miRNAs. Furthermore, our study unveiled four trans-kingdom miRNAs, forming a foundation for exploring melon's resistance to broomrape.
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Affiliation(s)
| | | | | | | | - Hao-Jie Wang
- Hami Melon Research Center, Xinjiang Academy of Agricultural Sciences, Urumqi, China
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Divya K, Thangaraj M, Krishna Radhika N. CRISPR/Cas9: an advanced platform for root and tuber crops improvement. Front Genome Ed 2024; 5:1242510. [PMID: 38312197 PMCID: PMC10836405 DOI: 10.3389/fgeed.2023.1242510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 12/26/2023] [Indexed: 02/06/2024] Open
Abstract
Root and tuber crops (RTCs), which include cassava, potato, sweet potato, and yams, principally function as staple crops for a considerable fraction of the world population, in addition to their diverse applications in nutrition, industry, and bioenergy sectors. Even then, RTCs are an underutilized group considering their potential as industrial raw material. Complexities in conventional RTC improvement programs curb the extensive exploitation of the potentials of this group of crop species for food, energy production, value addition, and sustainable development. Now, with the advent of whole-genome sequencing, sufficient sequence data are available for cassava, sweet potato, and potato. These genomic resources provide enormous scope for the improvement of tuber crops, to make them better suited for agronomic and industrial applications. There has been remarkable progress in RTC improvement through the deployment of new strategies like gene editing over the last decade. This review brings out the major areas where CRISPR/Cas technology has improved tuber crops. Strategies for genetic transformation of RTCs with CRISPR/Cas9 constructs and regeneration of edited lines and the bottlenecks encountered in their establishment are also discussed. Certain attributes of tuber crops requiring focus in future research along with putative editing targets are also indicated. Altogether, this review provides a comprehensive account of developments achieved, future lines of research, bottlenecks, and major experimental concerns regarding the establishment of CRISPR/Cas9-based gene editing in RTCs.
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Affiliation(s)
- K Divya
- ICAR-Central Tuber Crops Research Institute, Thiruvananthapuram, India
| | | | - N Krishna Radhika
- ICAR-Central Tuber Crops Research Institute, Thiruvananthapuram, India
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Zheng L, Assane Hamidou A, Zhao X, Ouyang Z, Lin H, Li J, Zhang X, Luo K, Chen Y. Superoxide dismutase gene family in cassava revealed their involvement in environmental stress via genome-wide analysis. iScience 2023; 26:107801. [PMID: 37954140 PMCID: PMC10638475 DOI: 10.1016/j.isci.2023.107801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 07/29/2023] [Accepted: 08/29/2023] [Indexed: 11/14/2023] Open
Abstract
Superoxide dismutase (SOD) is a crucial metal-containing enzyme that plays a vital role in catalyzing the dismutation of superoxide anions, converting them into molecular oxygen and hydrogen peroxide, essential for enhancing plant stress tolerance. We identified 8 SOD genes (4 CSODs, 2 FSODs, and 2 MSODs) in cassava. Bioinformatics analyses provided insights into chromosomal location, phylogenetic relationships, gene structure, conserved motifs, and gene ontology annotations. MeSOD genes were classified into two groups through phylogenetic analysis, revealing evolutionary connections. Promoters of these genes harbored stress-related cis-elements. Duplication analysis indicated the functional significance of MeCSOD2/MeCSOD4 and MeMSOD1/MeMSOD2. Through qRT-PCR, MeCSOD2 responded to salt stress, MeMSOD2 to drought, and cassava bacterial blight. Silencing MeMSOD2 increased XpmCHN11 virulence, indicating MeMSOD2 is essential for cassava's defense against XpmCHN11 infection. These findings enhance our understanding of the SOD gene family's role in cassava and contribute to strategies for stress tolerance improvement.
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Affiliation(s)
- Linling Zheng
- Sanya Nanfan Research Institute of Hainan University, School of Life Sciences, Hainan University, Sanya 572025, China
| | - Abdoulaye Assane Hamidou
- Sanya Nanfan Research Institute of Hainan University, School of Life Sciences, Hainan University, Sanya 572025, China
| | - Xuerui Zhao
- Sanya Nanfan Research Institute of Hainan University, School of Life Sciences, Hainan University, Sanya 572025, China
| | - Zhiwei Ouyang
- HNU-ASU Joint International Tourism College, Hainan University, Haikou 570228, China
| | - Hongxin Lin
- Soil Fertilizer and Resources Environment Institute, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China
| | - Junyi Li
- Sanya Nanfan Research Institute of Hainan University, School of Life Sciences, Hainan University, Sanya 572025, China
| | - Xiaofei Zhang
- Alliance of Bioversity International and the International Center for Tropical Agriculture (CIAT), Cali 763537, Colombia
| | - Kai Luo
- Sanya Nanfan Research Institute of Hainan University, School of Life Sciences, Hainan University, Sanya 572025, China
| | - Yinhua Chen
- Sanya Nanfan Research Institute of Hainan University, School of Life Sciences, Hainan University, Sanya 572025, China
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Fu H, Zhao Y, Huang J, Luo Y, Wei Z, Yu B, Wen F. Reduced glutathione and raffinose lengthens postharvest storage of cassava root tubers by improving antioxidant capacity and antibiosis. BMC PLANT BIOLOGY 2023; 23:475. [PMID: 37807058 PMCID: PMC10561434 DOI: 10.1186/s12870-023-04466-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 09/14/2023] [Indexed: 10/10/2023]
Abstract
Cassava is an ideal food security crop in marginal and drought environment. However, the post-harvest storage of cassava is urgent problem to be resolved. In this study, the storage tolerant and non-tolerant cassava were screened by measuring the change of Peroxidase (POD), Superoxide dismutase (SOD), Catalase (CAT) and Malondialdehyde (MDA) in seven cultivars of cassava. Compared with other cultivars, the cultivar of SC14 showed the highest level of SOD, MDA and POD respectively at 0 day, 12 day and 9 day postharvest while exhibited lowest level of CAT at 0 day postharvest, indicating the strongest antioxidant capability and storage tolerance. In contrast, GR15231, termed as storage non-tolerance cultivars, showed lowest SOD and POD at 12 day and kept a relative high level of CAT at 12 day post-harvest. In addition, SC14 has higher level of starch and dry substance than GR15231. Mass spectrum was performed for SC14 and GR15231 to explore the key metabolites regulating the storage tolerance of cassava. The results showed that the expression of glutathione (reduced) and raffinose was significantly decreased at 12 day post-harvest both in tolerant SC14 and non-tolerant GR15231. Compared with GR15231, SC14 showed higher level of raffinose both at 0 and 12 day post-harvest, indicating that raffinose may be the potential metabolites protecting SC14 cultivar from deterioration post-harvest. Additionally, raffinose ratio of SC14a/SC14b was five times less than that of GR15231a/GR15231b, reflecting the slower degradation of raffinose in SC14 cultivar compared with GR15231 cultivar. In conclusion, the antioxidant microenvironment induced by reduced glutathione and higher level of raffinose in SC14 cultivar might be the promising metabolites to improve its antioxidant capacity and antibiosis and thus maintained the quality of Cassava root tubers.
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Affiliation(s)
- Haitian Fu
- Guangxi Subtropical Crops Research Institute, Nanning, 530001, P.R. China
- International Cooperation Base for Science and Technology of Cassava, Ministry of Science and Technology, Nanning, 530001, P.R. China
| | - Ying Zhao
- Guangxi Subtropical Crops Research Institute, Nanning, 530001, P.R. China
- International Cooperation Base for Science and Technology of Cassava, Ministry of Science and Technology, Nanning, 530001, P.R. China
| | - Jianqi Huang
- Guangxi Subtropical Crops Research Institute, Nanning, 530001, P.R. China
- International Cooperation Base for Science and Technology of Cassava, Ministry of Science and Technology, Nanning, 530001, P.R. China
| | - Yanchun Luo
- Guangxi Subtropical Crops Research Institute, Nanning, 530001, P.R. China
- International Cooperation Base for Science and Technology of Cassava, Ministry of Science and Technology, Nanning, 530001, P.R. China
| | - Zusheng Wei
- Guangxi Subtropical Crops Research Institute, Nanning, 530001, P.R. China
- International Cooperation Base for Science and Technology of Cassava, Ministry of Science and Technology, Nanning, 530001, P.R. China
| | - Benchi Yu
- Guangxi Subtropical Crops Research Institute, Nanning, 530001, P.R. China
- International Cooperation Base for Science and Technology of Cassava, Ministry of Science and Technology, Nanning, 530001, P.R. China
| | - Feng Wen
- Guangxi Subtropical Crops Research Institute, Nanning, 530001, P.R. China.
- International Cooperation Base for Science and Technology of Cassava, Ministry of Science and Technology, Nanning, 530001, P.R. China.
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9
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Kuo WH, Small LL, Olsen KM. Variable expression of cyanide detoxification and tolerance genes in cyanogenic and acyanogenic white clover (Trifolium repens). AMERICAN JOURNAL OF BOTANY 2023; 110:e16233. [PMID: 37661820 DOI: 10.1002/ajb2.16233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 08/04/2023] [Accepted: 08/04/2023] [Indexed: 09/05/2023]
Abstract
PREMISE β-Cyanoalanine synthase (β-CAS) and alternative oxidase (AOX) play important roles in the ability of plants to detoxify and tolerate hydrogen cyanide (HCN). These functions are critical for all plants because HCN is produced at low levels during basic metabolic processes, and especially for cyanogenic species, which release high levels of HCN following tissue damage. However, expression of β-CAS and Aox genes has not been examined in cyanogenic species, nor compared between cyanogenic and acyanogenic genotypes within a species. METHODS We used a natural polymorphism for cyanogenesis in white clover to examine β-CAS and Aox gene expression in relation to cyanogenesis-associated HCN exposure. We identified all β-CAS and Aox gene copies present in the genome, including members of the Aox1, Aox2a, and Aox2d subfamilies previously reported in legumes. Expression levels were compared between cyanogenic and acyanogenic genotypes and between damaged and undamaged leaf tissue. RESULTS β-CAS and Aox2a expression was differentially elevated in cyanogenic genotypes, and tissue damage was not required to induce this increased expression. Aox2d, in contrast, appeared to be upregulated as a generalized wounding response. CONCLUSIONS These findings suggest a heightened constitutive role for HCN detoxification (via elevated β-CAS expression) and HCN-toxicity mitigation (via elevated Aox2a expression) in plants that are capable of cyanogenesis. As such, freezing-induced cyanide autotoxicity is unlikely to be the primary selective factor in the evolution of climate-associated cyanogenesis clines.
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Affiliation(s)
- Wen-Hsi Kuo
- Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Linda L Small
- Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Kenneth M Olsen
- Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, USA
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10
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Huang H, Song J, Feng Y, Zheng L, Chen Y, Luo K. Genome-Wide Identification and Expression Analysis of the SHI-Related Sequence Family in Cassava. Genes (Basel) 2023; 14:genes14040870. [PMID: 37107628 PMCID: PMC10138042 DOI: 10.3390/genes14040870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/31/2023] [Accepted: 04/03/2023] [Indexed: 04/08/2023] Open
Abstract
The SHORT INTERNODES (SHI)-related sequences (SRS) are plant-specific transcription factors that have been quantitatively characterized during plant growth, regeneration, and stress responses. However, the genome-wide discovery of SRS family genes and their involvement in abiotic stress-related activities in cassava have not been documented. A genome-wide search strategy was used to identify eight family members of the SRS gene family in cassava (Manihot esculenta Crantz). Based on their evolutionary linkages, all MeSRS genes featured homologous RING-like zinc finger and IXGH domains. Genetic architecture and conserved motif analysis validated the categorization of MeSRS genes into four groups. Eight pairs of segmental duplications were detected, resulting in an increase in the number of MeSRS genes. Orthologous studies of SRS genes among cassava and three different plant species (Arabidopsis thaliana, Oryza sativa, and Populus trichocarpa) provided important insights into the probable history of the MeSRS gene family. The functionality of MeSRS genes was elucidated through the prediction of protein–protein interaction networks and cis-acting domains. RNA-seq data demonstrated tissue/organ expression selectivity and preference of the MeSRS genes. Furthermore, qRT-PCR investigation of MeSRS gene expression after exposure to salicylic acid (SA) and methyl jasmonate (MeJA) hormone treatments, as well as salt (NaCl) and osmotic (polyethylene glycol, PEG) stresses, showed their stress-responsive patterns. This genome-wide characterization and identification of the evolutionary relationships and expression profiles of the cassava MeSRS family genes will be helpful for further research into this gene family and its function in stress response. It may also assist future agricultural efforts to increase the stress tolerance of cassava.
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Affiliation(s)
- Huling Huang
- Sanya Nanfan Research Institute, School of Tropical Crops, Hainan University, Haikou 572025, China
| | - Jiming Song
- Institute of Tropical and subtropical Economic Crops, Yunnan Provincial Academy of Agricultural Sciences, Baoshan 678000, China
| | - Yating Feng
- Sanya Nanfan Research Institute, School of Tropical Crops, Hainan University, Haikou 572025, China
| | - Linling Zheng
- Sanya Nanfan Research Institute, School of Tropical Crops, Hainan University, Haikou 572025, China
| | - Yinhua Chen
- Sanya Nanfan Research Institute, School of Tropical Crops, Hainan University, Haikou 572025, China
| | - Kai Luo
- Sanya Nanfan Research Institute, School of Tropical Crops, Hainan University, Haikou 572025, China
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11
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Gomez MA, Berkoff KC, Gill BK, Iavarone AT, Lieberman SE, Ma JM, Schultink A, Karavolias NG, Wyman SK, Chauhan RD, Taylor NJ, Staskawicz BJ, Cho MJ, Rokhsar DS, Lyons JB. CRISPR-Cas9-mediated knockout of CYP79D1 and CYP79D2 in cassava attenuates toxic cyanogen production. FRONTIERS IN PLANT SCIENCE 2023; 13:1079254. [PMID: 37007603 PMCID: PMC10064795 DOI: 10.3389/fpls.2022.1079254] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 12/21/2022] [Indexed: 05/31/2023]
Abstract
Cassava (Manihot esculenta) is a starchy root crop that supports over a billion people in tropical and subtropical regions of the world. This staple, however, produces the neurotoxin cyanide and requires processing for safe consumption. Excessive consumption of insufficiently processed cassava, in combination with protein-poor diets, can have neurodegenerative impacts. This problem is further exacerbated by drought conditions which increase this toxin in the plant. To reduce cyanide levels in cassava, we used CRISPR-mediated mutagenesis to disrupt the cytochrome P450 genes CYP79D1 and CYP79D2 whose protein products catalyze the first step in cyanogenic glucoside biosynthesis. Knockout of both genes eliminated cyanide in leaves and storage roots of cassava accession 60444; the West African, farmer-preferred cultivar TME 419; and the improved variety TMS 91/02324. Although knockout of CYP79D2 alone resulted in significant reduction of cyanide, mutagenesis of CYP79D1 did not, indicating these paralogs have diverged in their function. The congruence of results across accessions indicates that our approach could readily be extended to other preferred or improved cultivars. This work demonstrates cassava genome editing for enhanced food safety and reduced processing burden, against the backdrop of a changing climate.
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Affiliation(s)
- Michael A. Gomez
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
| | - Kodiak C. Berkoff
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
- Department of Molecular & Cell Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Baljeet K. Gill
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
| | - Anthony T. Iavarone
- California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, Berkeley, CA, United States
| | - Samantha E. Lieberman
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
- Department of Plant & Microbial Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Jessica M. Ma
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
- Department of Plant & Microbial Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Alex Schultink
- Department of Plant & Microbial Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Nicholas G. Karavolias
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
- Department of Plant & Microbial Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Stacia K. Wyman
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
| | | | - Nigel J. Taylor
- Donald Danforth Plant Science Center, St. Louis, MO, United States
| | - Brian J. Staskawicz
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
- Department of Plant & Microbial Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Myeong-Je Cho
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
| | - Daniel S. Rokhsar
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
- Department of Molecular & Cell Biology, University of California, Berkeley, Berkeley, CA, United States
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
- Molecular Genetics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
- Chan-Zuckerberg BioHub, San Francisco, CA, United States
| | - Jessica B. Lyons
- Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, United States
- Department of Molecular & Cell Biology, University of California, Berkeley, Berkeley, CA, United States
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12
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Wahengbam ED, Devi CP, Sharma SK, Roy SS, Maibam A, Dasgupta M, Luikham S, Chongtham T, Ningombam A, Bhupenchandra I, Singh LK, Devi YP, Thokchom S, Khaba CI, Singh NB, Rajashekar Y, Das S, Mohanty S, Sahoo MR. Reactive oxygen species turnover, phenolics metabolism, and some key gene expressions modulate postharvest physiological deterioration in cassava tubers. Front Microbiol 2023; 14:1148464. [PMID: 36925477 PMCID: PMC10011484 DOI: 10.3389/fmicb.2023.1148464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 02/13/2023] [Indexed: 03/08/2023] Open
Abstract
Rapid postharvest physiological deterioration (PPD) in cassava (Manihot esculenta Crantz) tuber is a significant concern during storage. The freshly harvested tubers start spoiling within 24 to 72 h. Accumulation of H2O2 is one of the earliest biochemical events that occurred during PPD, which was detected using the 3,3 diaminobenzidine (DAB) in two contrast cassava genotypes, MNP Local A (29-57 μg g-1) and Sree Prakash (64-141 μg g-1). Accumulating the fluorescence hydroxycoumarin compounds emitted by the cassava tubers observed under an ultraviolet (UV) lamp showed significant variations at 0, 3, 6, 9, 12, and 15 days of storage. The total phenolics and carotenoids significantly and negatively correlated with PPD progression; however, the anthocyanin and flavonoids positively correlated with the PPD-anchored ROS accumulation. The primary compound, Phthalic acid, di(2-propylpentyl) ester, was identified in both the cassava tubers, Sree Prakash (57.21 and 35.21%), and MNP Local A (75.58 and 60.21%) at 0, and 72 h of PPD, respectively. The expression of PPD-associated genes APX-2, APX-3, PAL, and AP was higher at 6-12 days of PPD, which signified the synthesis of ROS turnover and phenylpropanoid biosynthesis. A significant, strong, and positive correlation was established between the secondary metabolites and PPD signaling gene expression, which was inversely correlated with hydroxycoumarin and H2O2 accumulation. MNP Local A tubers exhibited longer storage life of 15 days with a low PPD score, higher metabolites synthesis, and gene expression. The PPD-resistant lines may be used to augment cassava breeding strategies for large-scale commercial and industrial use.
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Affiliation(s)
| | | | | | - Subhra Saikat Roy
- ICAR Research Complex for North Eastern Hill Region, Imphal, Manipur, India
| | - Albert Maibam
- ICAR Research Complex for North Eastern Hill Region, Imphal, Manipur, India
| | - Madhumita Dasgupta
- ICAR Research Complex for North Eastern Hill Region, Imphal, Manipur, India
| | - Star Luikham
- ICAR Research Complex for North Eastern Hill Region, Imphal, Manipur, India
| | - Tania Chongtham
- ICAR Research Complex for North Eastern Hill Region, Imphal, Manipur, India
| | - Arati Ningombam
- ICAR Research Complex for North Eastern Hill Region, Imphal, Manipur, India
| | - Ingudam Bhupenchandra
- Farm Science Centre, ICAR Research Complex for North Eastern Hill Region, Imphal, Manipur, India
| | - Laishram Kanta Singh
- Farm Science Centre, ICAR Research Complex for North Eastern Hill Region, Imphal, Manipur, India
| | - Yumnam Prabhabati Devi
- Farm Science Centre, ICAR Research Complex for North Eastern Hill Region, Imphal, Manipur, India
| | | | | | | | - Yallappa Rajashekar
- Institute of Bioresources and Sustainable Development, Imphal, Manipur, India
| | - Sudripta Das
- Institute of Bioresources and Sustainable Development, Imphal, Manipur, India
| | - Sansuta Mohanty
- Central Horticultural Experiment Station, ICAR–Indian Institute of Horticultural Research, Bhubaneswar, Odisha, India
| | - Manas Ranjan Sahoo
- ICAR Research Complex for North Eastern Hill Region, Imphal, Manipur, India
- Central Horticultural Experiment Station, ICAR–Indian Institute of Horticultural Research, Bhubaneswar, Odisha, India
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13
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Zainuddin IM, Lecart B, Sudarmonowati E, Vanderschuren H. A method for rapid and homogenous initiation of post-harvest physiological deterioration in cassava storage roots identifies Indonesian cultivars with improved shelf-life performance. PLANT METHODS 2023; 19:4. [PMID: 36653871 PMCID: PMC9847153 DOI: 10.1186/s13007-022-00977-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
Cassava is the most cultivated and consumed root crop in the world. One of the major constraints to the cassava value chain is the short shelf life of cassava storage roots which is primarily due to the so-called post-harvest physiological deterioration (PPD). The identification of natural sources of PPD tolerance represents a key approach to mitigating PPD losses by generating farmer- and industry-preferred cassava cultivars with prolonged shelf life. In the present study, a PPD assessment method was developed to screen for PPD tolerance in the cassava germplasm. The proposed PPD assessment method displayed a reduced rate of microbial infection and allowed a rapid and homogenous development of typical PPD symptoms in the cassava storage roots. We successfully used the PPD assessment method in combination with an image-based PPD scoring method to identify and characterize PPD tolerance in 28 cassava cultivars from the Indonesian cassava germplasm. Our analysis showed a significant and positive correlation between PPD score and dry matter content (r = 0.589-0.664, p-value < 0.001). Analysis of additional root parameters showed a significant and positive correlation between PPD scores at 2 days post-harvest (dph) and root length (r = 0.388, p-value < 0.05). Our analysis identified at least 4 cultivars displaying a significantly delayed onset of PPD symptoms as compared to the other selected cultivars. The availability of cassava cultivars contrasting for tolerance to PPD will be particularly instrumental to understanding the molecular mechanisms associated with delayed PPD in cassava roots.
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Affiliation(s)
- Ima M Zainuddin
- Department of Biology, Plant Biotechnology, Eidgenössische Technische Hochschule (ETH) Zurich, Universitätstrasse 2, 8092, Zurich, Switzerland.
- Department of Biosystems, KU Leuven, Willem de Croylaan 42, Box 2455, 3001, Louvain, Belgium.
- Institut Teknologi Bandung (ITB), Jl. Ganesha 10, Bandung, 40132, Indonesia.
- Research Center for Genetics Engineering, National Research and Innovation Agency (BRIN), Jl. Raya Bogor Km. 46, Cibinong, 16911, Indonesia.
| | - Brieuc Lecart
- Plant Genetics, Gembloux Agro-Bio Tech, University of Liège, Passage Des Déportés 2, 5030, Gembloux, Belgium
| | - Enny Sudarmonowati
- Research Center for Genetics Engineering, National Research and Innovation Agency (BRIN), Jl. Raya Bogor Km. 46, Cibinong, 16911, Indonesia
| | - Hervé Vanderschuren
- Department of Biology, Plant Biotechnology, Eidgenössische Technische Hochschule (ETH) Zurich, Universitätstrasse 2, 8092, Zurich, Switzerland.
- Department of Biosystems, KU Leuven, Willem de Croylaan 42, Box 2455, 3001, Louvain, Belgium.
- Plant Genetics, Gembloux Agro-Bio Tech, University of Liège, Passage Des Déportés 2, 5030, Gembloux, Belgium.
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14
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Zierer W, Anjanappa RB, Lamm CE, Chang SH, Gruissem W, Sonnewald U. A promoter toolbox for tissue-specific expression supporting translational research in cassava ( Manihot esculenta). FRONTIERS IN PLANT SCIENCE 2022; 13:1042379. [PMID: 36605961 PMCID: PMC9807883 DOI: 10.3389/fpls.2022.1042379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 11/18/2022] [Indexed: 06/17/2023]
Abstract
There is an urgent need to stimulate agricultural output in many tropical and subtropical countries of the world to combat hunger and malnutrition. The starchy crop cassava (Manihot esculenta), growing even under sub-optimal conditions, is a key staple food in these regions, providing millions of people with food. Cassava biotechnology is an important technique benefiting agricultural progress, but successful implementation of many biotechnological concepts depends on the availability of the right spatiotemporal expression tools. Yet, well-characterized cassava promoters are scarce in the public domain. In this study, we investigate the promoter activity and tissue specificity of 24 different promoter elements in stably transformed cassava plants. We show that many of the investigated promoters, especially from other species, have surprisingly low activity and/or tissue specificity, but feature several promoter sequences that can drive tissue-specific expression in either autotrophic-, transport- or storage tissues. We especially highlight pAtCAB1, pMePsbR, and pSlRBCS2 as strong and specific source promoters, pAtSUC2, pMeSWEET1-like, and pMeSUS1 as valuable tools for phloem and phloem parenchyma expression, and pStB33, pMeGPT, pStGBSS1, as well as pStPatatin Class I, as strong and specific promoters for heterotrophic storage tissues. We hope that the provided information and sequences prove valuable to the cassava community by contributing to the successful implementation of biotechnological concepts aimed at the improvement of cassava nutritional value and productivity.
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Affiliation(s)
- Wolfgang Zierer
- Biochemistry, Department of Biology, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Ravi Bodampalli Anjanappa
- Plant Biotechnology, Department of Biology, Eidgenössische Technische Hochschule (ETH) Zurich, Zurich, Switzerland
| | - Christian Erwin Lamm
- Biochemistry, Department of Biology, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Shu-Heng Chang
- Advanced Plant Biotechnology Center, National Chung Hsing University, Taichung, Taiwan
| | - Wilhelm Gruissem
- Plant Biotechnology, Department of Biology, Eidgenössische Technische Hochschule (ETH) Zurich, Zurich, Switzerland
- Advanced Plant Biotechnology Center, National Chung Hsing University, Taichung, Taiwan
| | - Uwe Sonnewald
- Biochemistry, Department of Biology, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
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15
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Chlorine Dioxide Treatment Modulates Ripening-Related Genes and Antioxidant System to Improve the Storability of Tomato. J FOOD QUALITY 2022. [DOI: 10.1155/2022/3818269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Chlorine dioxide (ClO2) is used to maintain quality and safety of fresh produce. However, ClO2 action mechanism in fresh produce is unknown. In this study, firstly, we evaluated the efficacy of ClO2 treatment on the quality, chilling injury, and calyx molding of tomatoes stored at two different temperatures. Then, ClO2 effect on the expression of cell wall- and ripening-related genes and on the activity of antioxidant enzymes was investigated. Tomatoes were treated with gaseous ClO2 for 15 min before transferring them to 13°C for 12 days and/or 4°C for 14 days, followed by 5 days at 20°C (shelf-life conditions). ClO2 treatment marginally reduced the rate of respiration but did not affect ethylene production at 13°C and 4°C storage or at shelf-life conditions. When stored at 13°C, treatment with ClO2 reduced the loss of firmness, with concomitant repression of pectin esterase 1, a cell wall-related gene. Additionally, at 13°C storage conditions, ClO2 treatment maintained tomato quality in terms of soluble solid content, titratable acidity, and color and was associated with the downregulation of the ripening-relatedethylene response factors B3/C1/E1 and the induction of antioxidant genes encoding catalase and ascorbate peroxidase. At 4°C storage conditions, ClO2 at a concentration of 15 ppm not only maintained the firmness and quality of tomatoes but also inhibited pitting during shelf-life with a concomitant increase of catalase activity. Moreover, treatment with 15 ppm ClO2 significantly reduced the calyx molding that is generally observed in fruits stored at 13°C and under shelf-life conditions. Hence, our results indicate that ClO2 treatment effectively maintained tomato quality and inhibited calyx molding by partially regulating ripening-related genes and antioxidant systems, thereby improving the storability of postharvest tomatoes.
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16
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Yan Y, Zhao S, Ye X, Tian L, Shang S, Tie W, Zeng L, Zeng L, Yang J, Li M, Wang Y, Xie Z, Hu W. Abscisic Acid Signaling in the Regulation of Postharvest Physiological Deterioration of Sliced Cassava Tuberous Roots. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:12830-12840. [PMID: 36183268 DOI: 10.1021/acs.jafc.2c05483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Phytohormone abscisic acid (ABA) influences the shelf life of fruit, vegetables, and tubers after harvest. However, little is known about the core signaling module involved in ABA's control of the postharvest physiological process. Exogenous ABA alleviated postharvest physiological deterioration (PPD) symptoms of sliced cassava tuberous roots, increased endogenous ABA levels, and reduced endogenous H2O2 content. The specific ABA signaling module during the PPD process was identified as MePYL6-MePP2C16-MeSnRK2.1-MebZIP5/34. MebZIP5/MebZIP34 directly binds to and activates the promoters of MeGRX6/MeMDAR1 through ABRE elements. Exogenous ABA significantly induced the expression of genes involved in this module, glutaredoxin content, and monodehydroascorbate reductase activity. We presented a hypothesis suggesting that MePYL6-MePP2C16-MeSnRK2.1-MebZIP5/34-MeGRX6/MeMDAR1 is involved in ABA-induced antioxidative capacity, thus alleviating PPD symptoms in cassava tuberous roots. The identification of the specific signaling module involved in ABA's control of PPD provides a basis and potential targets for extending the shelf life of cassava tuberous roots.
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Affiliation(s)
- Yan Yan
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
| | - Sihan Zhao
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- School of Horticulture, School of Life Sciences, Hainan University, Haikou570228, China
| | - Xiaoxue Ye
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya572025, China
| | - Libo Tian
- School of Horticulture, School of Life Sciences, Hainan University, Haikou570228, China
| | - Sang Shang
- School of Horticulture, School of Life Sciences, Hainan University, Haikou570228, China
| | - Weiwei Tie
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya572025, China
| | - Liwang Zeng
- Institute of Scientific and Technical Information, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
| | - Liming Zeng
- Institute of Scientific and Technical Information, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
| | - Jinghao Yang
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
| | - Meiying Li
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
| | - Yu Wang
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya572025, China
| | - Zhengnan Xie
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya572025, China
| | - Wei Hu
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou571101, China
- Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya572025, China
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17
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Ma Q, Xu J, Feng Y, Wu X, Lu X, Zhang P. Knockdown of p-Coumaroyl Shikimate/Quinate 3′-Hydroxylase Delays the Occurrence of Post-Harvest Physiological Deterioration in Cassava Storage Roots. Int J Mol Sci 2022; 23:ijms23169231. [PMID: 36012496 PMCID: PMC9409078 DOI: 10.3390/ijms23169231] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 08/03/2022] [Accepted: 08/05/2022] [Indexed: 11/16/2022] Open
Abstract
Cassava storage roots are an important source of food, feed, and material for starch-based industries in many countries. After harvest, rapid post-harvest physiological deterioration (PPD) reduces their palatability and marketability. During the PPD process, vascular streaking occurs through over-accumulation of coumarins, the biosynthesis of which involves the key enzyme p-coumaroyl shikimate/quinate 3′-hydroxylase (C3′H). Repression of MeC3′H expression by RNA interference in transgenic cassava plants caused a significant delay in PPD by decreasing scopoletin and scopolin accumulation in field-harvested storage roots. This study demonstrates that MeC3′H is the key enzyme participating in coumarin biosynthesis during PPD and shows that MeC3′H is a useful target gene for editing to prolong the shelf life of cassava storage roots.
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Affiliation(s)
- Qiuxiang Ma
- National Key Laboratory of Plant Molecular Genetics, Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Jia Xu
- National Key Laboratory of Plant Molecular Genetics, Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yancai Feng
- National Key Laboratory of Plant Molecular Genetics, Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoyun Wu
- National Key Laboratory of Plant Molecular Genetics, Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Xinlu Lu
- National Key Laboratory of Plant Molecular Genetics, Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Peng Zhang
- National Key Laboratory of Plant Molecular Genetics, Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Correspondence:
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18
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Beyene G, Chauhan RD, Gehan J, Siritunga D, Taylor N. Cassava shrunken-2 homolog MeAPL3 determines storage root starch and dry matter content and modulates storage root postharvest physiological deterioration. PLANT MOLECULAR BIOLOGY 2022; 109:283-299. [PMID: 32270429 PMCID: PMC9163024 DOI: 10.1007/s11103-020-00995-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 03/05/2020] [Indexed: 05/05/2023]
Abstract
Among the five cassava isoforms (MeAPL1-MeAPL5), MeAPL3 is responsible for determining storage root starch content. Degree of storage root postharvest physiological deterioration (PPD) is directly correlated with starch content. AGPase is heterotetramer composed of two small and two large subunits each coded by small gene families in higher plants. Studies in cassava (Manihot esculenta) identified and characterized five isoforms of Manihot esculenta ADP-glucose pyrophosphorylase large subunit (MeAPL1-MeAPL5) and employed virus induced gene silencing (VIGS) to show that MeAPL3 is the key isoform responsible for starch and dry matter accumulation in cassava storage roots. Silencing of MeAPL3 in cassava through stable transgenic lines resulted in plants displaying significant reduction in storage root starch and dry matter content (DMC) and induced a distinct phenotype associated with increased petiole/stem angle, resulting in a droopy leaf phenotype. Plants with reduced starch and DMC also displayed significantly reduced or no postharvest physiological deterioration (PPD) compared to controls and lines with high DMC and starch content. This provides strong evidence for direct relationships between starch/dry matter content and its role in PPD and canopy architecture traits in cassava.
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Affiliation(s)
- Getu Beyene
- Donald Danforth Plant Science Center, St. Louis, MO, USA.
| | | | - Jackson Gehan
- Donald Danforth Plant Science Center, St. Louis, MO, USA
| | - Dimuth Siritunga
- Department of Biology, University of Puerto Rico, Mayaguez, Puerto Rico
| | - Nigel Taylor
- Donald Danforth Plant Science Center, St. Louis, MO, USA
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Tarumoto MB, de Campos M, Momesso L, do Nascimento CAC, Garcia A, Coscolin RBDS, Martello JM, Crusciol CAC. Carbohydrate Partitioning and Antioxidant Substances Synthesis Clarify the Differences Between Sugarcane Varieties on Facing Low Phosphorus Availability. FRONTIERS IN PLANT SCIENCE 2022; 13:888432. [PMID: 35646030 PMCID: PMC9131043 DOI: 10.3389/fpls.2022.888432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 04/15/2022] [Indexed: 06/15/2023]
Abstract
Phosphorus (P) availability is important for metabolic process, tillering and formation of a vigorous root system in sugarcane, but sugarcane varieties differ in P uptake efficiency. This study evaluated the enzymatic, nutritional, and biometric parameters of two sugarcane varieties under two conditions of P availability by monitoring the initial development of plants grown in nutrient solution. The experiment was performed using randomized complete block design (RCBD) with five replicates and included two varieties, RB966928 (high nutritional requirements) and RB867515 (low nutritional requirements), and two concentrations of P in the nutrient solution: low (2 mg L-1) and suitable (16 mg L-1). Carbohydrate concentrations and partitioning, leaf nutrient concentrations, enzymatic activity, and shoot and root biometric parameters were analyzed. Regardless of sugarcane variety and the part of the plant, reducing sugar were approximately 32.5% higher in RB867515 and 38.5% higher in RB966928 under suitable P compared with low P. Sucrose concentrations were significantly higher in both varieties under suitable P than in low P. According to PCA, the relationship between reducing sugars and sucrose was closer in RB966928 than in RB867515. Under low P, soluble protein content decreased, and the activities of the antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) and the concentrations of hydrogen peroxide (H2O2), and malondialdehyde (MDA). The variety RB966928 under suitable P appears to have a high capacity for proline (120%) upregulation under abiotic stress compared with RB867515 (54%), and thus higher biomass accumulation of this RB966928 variety; however, RB867515 had superior results compared to RB966928 under low P. Suitable P increased leaf concentrations of N, P, Mg, B, and Mg and decreased leaf Zn content. Root and shoot dry matter, root length, plant height, and root and stalk diameter increased by suitable P. Regardless of variety, both nutritional and biometric parameters were directly influenced by P levels, including sugarcane yield. In relation of sugarcane dry matter, RB966928 was less sensitive to low P levels and more responsive to P supply than RB867515 and thus may be more suitable for environments in which P is limiting.
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Affiliation(s)
- Miriam Büchler Tarumoto
- Department of Crop Science, College of Agricultural Sciences, São Paulo State University (UNESP), Botucatu, Brazil
| | - Murilo de Campos
- Department of Crop Science, College of Agricultural Sciences, São Paulo State University (UNESP), Botucatu, Brazil
| | - Letusa Momesso
- Department of Crop Science, College of Agricultural Sciences, São Paulo State University (UNESP), Botucatu, Brazil
| | | | - Ariani Garcia
- Department of Crop Science, College of Agricultural Sciences, São Paulo State University (UNESP), Botucatu, Brazil
| | | | - Jorge Martinelli Martello
- Department of Crop Science, College of Agricultural Sciences, São Paulo State University (UNESP), Botucatu, Brazil
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McMahon J, Sayre R, Zidenga T. Cyanogenesis in cassava and its molecular manipulation for crop improvement. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:1853-1867. [PMID: 34905020 DOI: 10.1093/jxb/erab545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 12/10/2021] [Indexed: 06/14/2023]
Abstract
While cassava is one of the most important staple crops worldwide, it has received the least investment per capita consumption of any of the major global crops. This is in part due to cassava being a crop of subsistence farmers that is grown in countries with limited resources for crop improvement. While its starchy roots are rich in calories, they are poor in protein and other essential nutrients. In addition, they contain potentially toxic levels of cyanogenic glycosides which must be reduced to safe levels before consumption. Furthermore, cyanogens compromise the shelf life of harvested roots due to cyanide-induced inhibition of mitochondrial respiration, and associated production of reactive oxygen species that accelerate root deterioration. Over the past two decades, the genetic, biochemical, and developmental factors that control cyanogen synthesis, transport, storage, and turnover have largely been elucidated. It is now apparent that cyanogens contribute substantially to whole-plant nitrogen metabolism and protein synthesis in roots. The essential role of cyanogens in root nitrogen metabolism, however, has confounded efforts to create acyanogenic varieties. This review proposes alternative molecular approaches that integrate accelerated cyanogen turnover with nitrogen reassimilation into root protein that may offer a solution to creating a safer, more nutritious cassava crop.
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21
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Muhammad H, Bakar TASTA, Yusery MFA, Awang N, Saad WMM, Ibnu Rasid EN, Mahomoodally MF, Omar MH. Oxidative Stress and DNA Damage Effect of Dioscorea hispida Dennst. on Placental Tissues of Rats. Molecules 2022; 27:molecules27072190. [PMID: 35408588 PMCID: PMC9000815 DOI: 10.3390/molecules27072190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 03/22/2022] [Accepted: 03/23/2022] [Indexed: 11/16/2022] Open
Abstract
Dioscorea hispida Dennst. locally known as “ubi gadung” has been used as a traditional remedy and source of carbohydrate among Malaysians. To assess the effect of Dioscorea hispida aqueous extract (DHAE) on the production of reactive oxygen species (ROS) and their effects on DNA damage in Sprague Dawley rat’s placental tissues, pregnant rats were randomly divided into four groups. The animals were orally treated with distilled water (negative control) and three different concentrations of DHAE (250, 500 and 1000 mg/kg body weight (BW)) from gestation day 6 until 20. The oxidative stress in placental tissues was evaluated at day 21 by measuring the level of ROS, superoxide dismutase (SOD) and lipid peroxidation biomarker, malondialdehyde (MDA) while comet assay was used for DNA damage. There was no significant production of ROS and SOD activities in all groups. Significant changes were observed in the MDA level at 1000 mg/kg BW DHAE. Comet assay revealed a significant increase (p < 0.05) of DNA damage on animals treated with 250 and 500 mg/kg BW DHAE but not at the highest concentration. It was postulated that the placental cells could have undergone necrosis which destroys all components including DNA. This occurrence simultaneously reduces the levels of DNA damage which can be represented by lower level of tail moments. This finding correlates with our histopathological examination where necrotic cells of spongiotrophoblast were observed in the basal zone of placental tissue. The high amount of hydrogen cyanide and other compounds in 1000 mg/kg BW DHAE could elevate the lipid peroxidation and directly induce cell necrosis which requires further investigation.
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Affiliation(s)
- Hussin Muhammad
- Herbal Medicine Research Centre, Institute for Medical Research, National Institutes of Health, Jalan Setia Murni U13/52, Seksyen U13, Setia Alam, Shah Alam 40170, Selangor, Malaysia; (N.A.); (M.H.O.)
- Correspondence: (H.M.); (E.N.I.R.)
| | - Tengku Aideed Syah Tg Abu Bakar
- Department of Medical Laboratory Technology, Faculty of Health Sciences, Universiti Teknologi MARA UiTM Puncak Alam, Bandar Puncak Alam 42300, Selangor, Malaysia; (T.A.S.T.A.B.); (M.F.A.Y.); (W.M.M.S.)
| | - Muhamad Faizul Adhzim Yusery
- Department of Medical Laboratory Technology, Faculty of Health Sciences, Universiti Teknologi MARA UiTM Puncak Alam, Bandar Puncak Alam 42300, Selangor, Malaysia; (T.A.S.T.A.B.); (M.F.A.Y.); (W.M.M.S.)
| | - Norizah Awang
- Herbal Medicine Research Centre, Institute for Medical Research, National Institutes of Health, Jalan Setia Murni U13/52, Seksyen U13, Setia Alam, Shah Alam 40170, Selangor, Malaysia; (N.A.); (M.H.O.)
| | - Wan Mazlina Md. Saad
- Department of Medical Laboratory Technology, Faculty of Health Sciences, Universiti Teknologi MARA UiTM Puncak Alam, Bandar Puncak Alam 42300, Selangor, Malaysia; (T.A.S.T.A.B.); (M.F.A.Y.); (W.M.M.S.)
| | - Elda Nurafnie Ibnu Rasid
- Herbal Medicine Research Centre, Institute for Medical Research, National Institutes of Health, Jalan Setia Murni U13/52, Seksyen U13, Setia Alam, Shah Alam 40170, Selangor, Malaysia; (N.A.); (M.H.O.)
- Correspondence: (H.M.); (E.N.I.R.)
| | - Mohamad Fawzi Mahomoodally
- Department of Health Sciences, Faculty of Medicine and Health Science, University of Mauritius, Réduit 80837, Mauritius;
| | - Maizatul Hasyima Omar
- Herbal Medicine Research Centre, Institute for Medical Research, National Institutes of Health, Jalan Setia Murni U13/52, Seksyen U13, Setia Alam, Shah Alam 40170, Selangor, Malaysia; (N.A.); (M.H.O.)
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22
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Wu X, Xu J, Ma Q, Ahmed S, Lu X, Ling E, Zhang P. Lysozyme inhibits postharvest physiological deterioration of cassava. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2022; 64:621-624. [PMID: 35195347 DOI: 10.1111/jipb.13219] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 12/29/2021] [Indexed: 05/24/2023]
Abstract
After harvest, cassava (Manihot esculenta Crantz) storage roots undergo rapid postharvest physiological deterioration, producing blue-brown discoloration in the vasculature due to the production of polyphenolics (mainly quinones and coumarins) by enzymes such as polyphenol oxidase (PPO). Here, we report the application of hen egg-white lysozyme (HEWL), a natural PPO inhibitor, in transgenic cassava to repress the symptoms of postharvest physiological deterioration. The HEWL-expressing transgenic plants had lower levels of the two main cassava coumarins tested, scopoletin and scopolin, compared with wild type. HEWL-expressing cassava also showed increased tolerance of oxidative stress. Overall, the lysozyme-PPO system proved to be functional in plants for repressing PPO-mediated commercial product browning.
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Affiliation(s)
- Xiaoyun Wu
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, The Chinese Academy of Science, Shanghai, 200032, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jia Xu
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, The Chinese Academy of Science, Shanghai, 200032, China
| | - Qiuxiang Ma
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, The Chinese Academy of Science, Shanghai, 200032, China
| | - Sulaiman Ahmed
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, The Chinese Academy of Science, Shanghai, 200032, China
| | - Xinlu Lu
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, The Chinese Academy of Science, Shanghai, 200032, China
| | - Erjun Ling
- CAS Key Laboratory of Insect Developmental and Evolutionary Biology, CAS Center for Excellence in Molecular Plant Sciences, The Chinese Academy of Science, Shanghai, 200032, China
| | - Peng Zhang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, The Chinese Academy of Science, Shanghai, 200032, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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23
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Kerchev PI, Van Breusegem F. Improving oxidative stress resilience in plants. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2022; 109:359-372. [PMID: 34519111 DOI: 10.1111/tpj.15493] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 09/02/2021] [Accepted: 09/08/2021] [Indexed: 05/22/2023]
Abstract
Originally conceived as harmful metabolic byproducts, reactive oxygen species (ROS) are now recognized as an integral part of numerous cellular programs. Thanks to their diverse physicochemical properties, compartmentalized production, and tight control exerted by the antioxidant machinery they activate signaling pathways that govern plant growth, development, and defense. Excessive ROS levels are often driven by adverse changes in environmental conditions, ultimately causing oxidative stress. The associated negative impact on cellular constituents have been a major focus of decade-long research efforts to improve the oxidative stress resilience by boosting the antioxidant machinery in model and crop species. We highlight the role of enzymatic and non-enzymatic antioxidants as integral factors of multiple signaling cascades beyond their mere function to prevent oxidative damage under adverse abiotic stress conditions.
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Affiliation(s)
- Pavel I Kerchev
- Phytophthora Research Centre, Department of Molecular Biology and Radiobiology, Faculty of AgriSciences, Mendel University in Brno, 61300, Brno, Czech Republic
| | - Frank Van Breusegem
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052, Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052, Gent, Belgium
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24
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An F, Xiao X, Chen T, Xue J, Luo X, Ou W, Li K, Cai J, Chen S. Systematic Analysis of bHLH Transcription Factors in Cassava Uncovers Their Roles in Postharvest Physiological Deterioration and Cyanogenic Glycosides Biosynthesis. FRONTIERS IN PLANT SCIENCE 2022; 13:901128. [PMID: 35789698 PMCID: PMC9249602 DOI: 10.3389/fpls.2022.901128] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 05/09/2022] [Indexed: 05/15/2023]
Abstract
The basic helix-loop-helix (bHLH) proteins are a large superfamily of transcription factors, and play a central role in a wide range of metabolic, physiological, and developmental processes in higher organisms. However, systematic investigation of bHLH gene family in cassava (Manihot esculenta Crantz) has not been reported. In the present study, we performed a genome-wide survey and identified 148 MebHLHs genes were unevenly harbored in 18 chromosomes. Through phylogenetic analyses along with Arabidopsis counterparts, these MebHLHs genes were divided into 19 groups, and each gene contains a similar structure and conserved motifs. Moreover, many cis-acting regulatory elements related to various defense and stress responses showed in MebHLH genes. Interestingly, transcriptome data analyses unveiled 117 MebHLH genes during postharvest physiological deterioration (PPD) process of cassava tuberous roots, while 65 MebHLH genes showed significantly change. Meanwhile, the relative quantitative analysis of 15 MebHLH genes demonstrated that they were sensitive to PPD, suggesting they may involve in PPD process regulation. Cyanogenic glucosides (CGs) biosynthesis during PPD process was increased, silencing of MebHLH72 and MebHLH114 showed that linamarin content was significantly decreased in the leaves. To summarize, the genome-wide identification and expression profiling of MebHLH candidates pave a new avenue for uderstanding their function in PPD and CGs biosynthesis, which will accelerate the improvement of PPD tolerance and decrease CGs content in cassava tuberous roots.
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Affiliation(s)
- Feifei An
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Haikou, China
- School of Life Sciences, Hainan University, Haikou, China
| | - Xinhui Xiao
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Haikou, China
| | - Ting Chen
- Postgraduate Department, Hainan Normal University, Haikou, China
| | - Jingjing Xue
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Haikou, China
| | - Xiuqin Luo
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Haikou, China
| | - Wenjun Ou
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Haikou, China
| | - Kaimian Li
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Haikou, China
| | - Jie Cai
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Haikou, China
- Jie Cai,
| | - Songbi Chen
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Haikou, China
- *Correspondence: Songbi Chen,
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Wang H, Zhao P, Shen X, Xia Z, Zhou X, Chen X, Lu C, WenquanWang. Genome-wide survey of the phosphofructokinase family in cassava and functional characterization in response to oxygen-deficient stress. BMC PLANT BIOLOGY 2021; 21:376. [PMID: 34399701 PMCID: PMC8365977 DOI: 10.1186/s12870-021-03139-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 06/08/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Glycolytic pathway is common in all plant organs, especially in oxygen-deficient tissues. Phosphofructokinase (PFK) is a rate-limiting enzyme in the glycolytic pathway and catalyses the phosphorylation of fructose-6-phosphate to fructose-1,6-bisphosphate. Cassava (M. esculenta) root is a huge storage organ with low amount of oxygen. However, less is known about the functions of PFK from M. esculenta (MePFK). We conducted a systematic analysis of MePFK genes to explore the function of the MePFK gene family under hypoxic stress. RESULTS We identified 13 MePFK genes and characterised their sequence structure. The phylogenetic tree divided the 13 genes into two groups: nine were MePFKs and four were pyrophosphate-fructose-6-phosphate phosphotransferase (MePFPs). We confirmed by green fluorescent protein fusion protein expression that MePFK03 and MePFPA1 were localised in the chloroplast and cytoplasm, respectively. The expression profiles of the 13 MePFKs detected by quantitative reverse transcription polymerase chain reaction revealed that MePFK02, MePFK03, MePFPA1, MePFPB1 displayed higher expression in leaves, root and flower. The expression of MePFK03, MePFPA1 and MePFPB1 in tuber root increased gradually with plant growth. We confirmed that hypoxia occurred in the cassava root, and the concentration of oxygen was sharply decreasing from the outside to the inside root. The expression of MePFK03, MePFPA1 and MePFPB1 decreased with the decrease in the oxygen concentration in cassava root. Waterlogging stress treatment showed that the transcript level of PPi-dependent MePFP and MeSuSy were up-regulated remarkably and PPi-dependent glycolysis bypass was promoted. CONCLUSION A systematic survey of phylogenetic relation, molecular characterisation, chromosomal and subcellular localisation and cis-element prediction of MePFKs were performed in cassava. The expression profiles of MePFKs in different development stages, organs and under waterlogging stress showed that MePFPA1 plays an important role during the growth and development of cassava. Combined with the transcriptional level of MeSuSy, we found that pyrophosphate (PPi)-dependent glycolysis bypass was promoted when cassava was under waterlogging stress. The results would provide insights for further studying the function of MePFKs under hypoxic stress.
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Affiliation(s)
- Haiyan Wang
- The Institute of Tropical Bioscience and Biotechnology (ITBB), Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, 571101, P. R. China
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Haikou, 571101, P. R. China
| | - Pingjuan Zhao
- The Institute of Tropical Bioscience and Biotechnology (ITBB), Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, 571101, P. R. China
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Haikou, 571101, P. R. China
| | - Xu Shen
- The Institute of Tropical Bioscience and Biotechnology (ITBB), Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, 571101, P. R. China
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Haikou, 571101, P. R. China
| | - Zhiqiang Xia
- College of Tropical Crops, Hainan University, Haikou, 570228, P. R. China
| | - Xincheng Zhou
- The Institute of Tropical Bioscience and Biotechnology (ITBB), Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, 571101, P. R. China
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Haikou, 571101, P. R. China
| | - Xin Chen
- The Institute of Tropical Bioscience and Biotechnology (ITBB), Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, 571101, P. R. China
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Haikou, 571101, P. R. China
| | - Cheng Lu
- The Institute of Tropical Bioscience and Biotechnology (ITBB), Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, 571101, P. R. China
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Haikou, 571101, P. R. China
| | - WenquanWang
- College of Tropical Crops, Hainan University, Haikou, 570228, P. R. China.
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26
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Cembrowska-Lech D. Tissue Printing and Dual Excitation Flow Cytometry for Oxidative Stress-New Tools for Reactive Oxygen Species Research in Seed Biology. Int J Mol Sci 2020; 21:E8656. [PMID: 33212814 PMCID: PMC7697308 DOI: 10.3390/ijms21228656] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/30/2020] [Accepted: 11/13/2020] [Indexed: 01/14/2023] Open
Abstract
The intracellular homeostasis of reactive oxygen species (ROS) and especially of superoxide anion and hydrogen peroxide participate in signaling cascades which dictate developmental processes and reactions to stresses. ROS are also biological molecules that play important roles in seed dormancy and germination. Because of their rapid reactivity, short half-life and low concentration, ROS are difficult to measure directly with high accuracy and precision. In presented work tissue printing method with image analysis and dual excitation flow cytometry (FCM) were developed for rapid detection and localization of O2•- and H2O2 in different part of seed. Tissue printing and FCM detection of ROS showed that germination of wild oat seeds was associated with the accumulation of O2•- and H2O2 in embryo (coleorhiza, radicle and scutellum), aleurone layer and coat. To verify if printing and FCM signals were specified, the detection of O2•- and H2O2 in seeds incubated in presence of O2•- generation inhibitor (DPI) or H2O2 scavenger (CAT) were examined. All results were a high level of agreement among the level of ROS derived from presented procedures with the ones created from spectrophotometric measured data. In view of the data obtained, tissue printing with image analysis and FCM are recommended as a simple and fast methods, which could help researchers to detection and level determination of ROS in the external and inner parts of the seeds.
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27
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Oyeyinka SA, Ayinla SO, Sanusi CT, Akintayo OA, Oyedeji AB, Oladipo JO, Akeem AO, Badmos AA, Adeloye AA, Diarra SS. Chemical and physicochemical properties of fermented flour from refrigerated cassava root and sensory properties of its cooked paste. J FOOD PROCESS PRES 2020. [DOI: 10.1111/jfpp.14684] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Samson A. Oyeyinka
- School of Agriculture and Food Technology University of the South Pacific Apia Samoa
- Department of Home Economics and Food Science University of Ilorin Ilorin Nigeria
- Department of Biotechnology and Food Technology Faculty of Science University of Johannesburg Johannesburg South Africa
| | - Suliat O. Ayinla
- Department of Home Economics and Food Science University of Ilorin Ilorin Nigeria
| | - Christiana T. Sanusi
- Department of Home Economics and Food Science University of Ilorin Ilorin Nigeria
| | - Olaide A. Akintayo
- Department of Home Economics and Food Science University of Ilorin Ilorin Nigeria
| | - Ajibola B. Oyedeji
- Department of Biotechnology and Food Technology Faculty of Science University of Johannesburg Johannesburg South Africa
| | - John O. Oladipo
- Department of Industrial Chemistry University of Ilorin Ilorin Nigeria
| | - Ahmed O. Akeem
- Department of Veterinary Microbiology University of Ilorin Ilorin Nigeria
| | | | | | - Siaka S. Diarra
- School of Agriculture and Food Technology University of the South Pacific Apia Samoa
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28
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Zeng J, Wu C, Wang C, Liao F, Mo J, Ding Z, Tie W, Yan Y, Hu W. Genomic analyses of heat stress transcription factors (HSFs) in simulated drought stress response and storage root deterioration after harvest in cassava. Mol Biol Rep 2020; 47:5997-6007. [PMID: 32710389 DOI: 10.1007/s11033-020-05673-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 07/17/2020] [Indexed: 12/11/2022]
Abstract
Heat shock factors (HSFs) play crucial roles in various plant stress responses. However, the current knowledge about HSFs in cassava, an important crop, is still insufficient. In this research, we identified 32 cassava HSF genes (MeHSFs) and clustered them into three groups (A, B, C) based on phylogenetic analysis and structural characteristics. Conserved motif analyses showed that MeHSFs display domains characteristic to HSF transcription factors. Gene structure analyses suggested that 29 MeHSFs contained only two exons. All identified 32 cassava MeHSFs were distributed on 13 chromosomes. Their expression profiles revealed that the different MeHSFs were expressed differentially in different tissues, most high expression genes belonged to group A. The similar MeHSFs were up-regulated after treatment with both PEG and abscisic acid (ABA), which implied that these MeHSFs may participate in resistance to simulated drought stress associated with the ABA signaling pathway. In addition, several MeHSFs were induced during postharvest physiological deterioration (PPD) in cassava. Our results provided basic but important knowledge for future gene function analysis of MeHSFs toward efforts in improving tolerance to abiotic stress and PPD in cassava.
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Affiliation(s)
- Jian Zeng
- Henry Fok College of Biology and Agriculture, Shaoguan University, Shaoguan, China.,Shaoguan Engineering Research Center for Aromatic Plants, Shaoguan, China
| | - Chunlai Wu
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Cheng Wang
- Yue Bei People's Hospital, Shaoguan, China
| | - Fengfeng Liao
- Henry Fok College of Biology and Agriculture, Shaoguan University, Shaoguan, China
| | - Jiajia Mo
- Henry Fok College of Biology and Agriculture, Shaoguan University, Shaoguan, China
| | - Zehong Ding
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China.,Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Weiwei Tie
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China.,Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Yan Yan
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China.,Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Wei Hu
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China. .,Hainan Key Laboratory for Protection and Utilization of Tropical Bioresources, Hainan Institute for Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou, China.
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Vanlerberghe GC, Dahal K, Alber NA, Chadee A. Photosynthesis, respiration and growth: A carbon and energy balancing act for alternative oxidase. Mitochondrion 2020; 52:197-211. [PMID: 32278748 DOI: 10.1016/j.mito.2020.04.001] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 02/28/2020] [Accepted: 04/06/2020] [Indexed: 12/26/2022]
Abstract
This review summarizes knowledge of alternative oxidase, a mitochondrial electron transport chain component that lowers the ATP yield of plant respiration. Analysis of mutant and transgenic plants has established that alternative oxidase activity supports leaf photosynthesis. The interaction of alternative oxidase respiration with chloroplast metabolism is important under conditions that challenge energy and/or carbon balance in the photosynthetic cell. Under such conditions, alternative oxidase provides an extra-chloroplastic means to optimize the status of chloroplast energy pools (ATP, NADPH) and to manage cellular carbohydrate pools in response to changing rates of carbon fixation and carbon demand for growth and maintenance. Transcriptional and post-translational mechanisms ensure that alternative oxidase can respond effectively when carbon and energy balance are being challenged. This function appears particularly significant under abiotic stress conditions such as water deficit, high salinity, or temperature extremes. Under such conditions, alternative oxidase respiration positively affects growth and stress tolerance, despite it lowering the energy yield and carbon use efficiency of respiration. In part, this beneficial effect relates to the ability of alternative oxidase respiration to prevent excessive reactive oxygen species generation in both mitochondria and chloroplasts. Recent evidence suggests that alternative oxidase respiration is an interesting target for crop improvement.
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Affiliation(s)
- Greg C Vanlerberghe
- Department of Biological Sciences, and Department of Cell and Systems Biology, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C1A4, Canada.
| | - Keshav Dahal
- Fredericton Research and Development Centre, Agriculture and Agri-Food Canada, 850 Lincoln Road, P.O. Box 20280, Fredericton, New Brunswick E3B4Z7, Canada
| | - Nicole A Alber
- Department of Biological Sciences, and Department of Cell and Systems Biology, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C1A4, Canada
| | - Avesh Chadee
- Department of Biological Sciences, and Department of Cell and Systems Biology, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C1A4, Canada
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30
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Nitric Oxide Improves the Tolerance of Pleurotus ostreatus to Heat Stress by Inhibiting Mitochondrial Aconitase. Appl Environ Microbiol 2020; 86:AEM.02303-19. [PMID: 31862720 PMCID: PMC7028963 DOI: 10.1128/aem.02303-19] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 12/06/2019] [Indexed: 11/20/2022] Open
Abstract
Heat stress is one of the abiotic stresses that affect the growth and development of edible fungi. Our previous study found that exogenous NO had a protective effect on mycelia under heat stress. However, its regulatory mechanism had not been elucidated. In this study, we found that NO altered the respiratory pathway of mycelia under heat stress by regulating aco. The results have enhanced our understanding of NO signaling pathways in P. ostreatus. Pleurotus ostreatus is widely cultivated in China. However, its cultivation is strongly affected by seasonal temperature changes, especially the high temperatures of summer. Nitric oxide (NO) was previously reported to alleviate oxidative damage to mycelia by regulating trehalose. In this study, we found that NO alleviated oxidative damage to P. ostreatus mycelia by inhibiting the protein and gene expression of aconitase (ACO), and additional studies found that the overexpression and interference of aco could affect the content of citric acid (CA). Furthermore, the addition of exogenous CA can induce alternative oxidase (aox) gene expression under heat stress, reduce the content of H2O2 in mycelium, and consequently protect the mycelia under heat stress. An additional analysis focused on the function of the aox gene in the heat stress response of mycelia. The results show that the colony diameter of the aox overexpression (OE-aox) strains was significantly larger than that of the wild-type (WT) strain under heat stress (32°C). In addition, the mycelia of OE-aox strains showed significantly enhanced tolerance to H2O2. In conclusion, this study demonstrates that NO can affect CA accumulation by regulating aco gene and ACO protein expression and that CA can induce aox gene expression and thereby be a response to heat stress. IMPORTANCE Heat stress is one of the abiotic stresses that affect the growth and development of edible fungi. Our previous study found that exogenous NO had a protective effect on mycelia under heat stress. However, its regulatory mechanism had not been elucidated. In this study, we found that NO altered the respiratory pathway of mycelia under heat stress by regulating aco. The results have enhanced our understanding of NO signaling pathways in P. ostreatus.
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31
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Florez-Sarasa I, Fernie AR, Gupta KJ. Does the alternative respiratory pathway offer protection against the adverse effects resulting from climate change? JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:465-469. [PMID: 31559421 PMCID: PMC6946008 DOI: 10.1093/jxb/erz428] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Elevated greenhouse gases (GHGs) induce adverse conditions directly and indirectly, causing decreases in plant productivity. To deal with climate change effects, plants have developed various mechanisms including the fine-tuning of metabolism. Plant respiratory metabolism is highly flexible due to the presence of various alternative pathways. The mitochondrial alternative oxidase (AOX) respiratory pathway is responsive to these changes, and several lines of evidence suggest it plays a role in reducing excesses of reactive oxygen species (ROS) and reactive nitrogen species (RNS) while providing metabolic flexibility under stress. Here we discuss the importance of the AOX pathway in dealing with elevated carbon dioxide (CO2), nitrogen oxides (NOx), ozone (O3), and the main abiotic stresses induced by climate change.
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Affiliation(s)
- Igor Florez-Sarasa
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB Bellaterra, Barcelona, Spain
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Kapuganti Jagadis Gupta
- National Institute for Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, India
- Correspondence:
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32
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Sweetman C, Waterman CD, Rainbird BM, Smith PMC, Jenkins CD, Day DA, Soole KL. AtNDB2 Is the Main External NADH Dehydrogenase in Mitochondria and Is Important for Tolerance to Environmental Stress. PLANT PHYSIOLOGY 2019; 181:774-788. [PMID: 31409698 PMCID: PMC6776847 DOI: 10.1104/pp.19.00877] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 07/23/2019] [Indexed: 05/02/2023]
Abstract
In addition to the classical electron transport pathway coupled to ATP synthesis, plant mitochondria have an alternative pathway that involves type II NAD(P)H dehydrogenases (NDs) and alternative oxidase (AOX). This alternative pathway participates in thermogenesis in select organs of some species and is thought to help prevent cellular damage during exposure to environmental stress. Here, we investigated the function and role of one alternative path component, AtNDB2, using a transgenic approach in Arabidopsis (Arabidopsis thaliana). Disruption of AtNDB2 expression via T-DNA insertion led to a 90% decrease of external NADH oxidation in isolated mitochondria. Overexpression of AtNDB2 led to increased AtNDB2 protein abundance in mitochondria but did not enhance external NADH oxidation significantly unless AtAOX1A was concomitantly overexpressed and activated, demonstrating a functional link between these enzymes. Plants lacking either AtAOX1A or AtNDB2 were more sensitive to combined drought and elevated light treatments, whereas plants overexpressing these components showed increased tolerance and capacity for poststress recovery. We conclude that AtNDB2 is the predominant external NADH dehydrogenase in mitochondria and together with AtAOX1A forms a complete, functional, nonphosphorylating pathway of electron transport, whose operation enhances tolerance to environmental stress. This study demonstrates that at least one of the alternative NDs, as well as AOX, are important for the stress response.
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Affiliation(s)
- Crystal Sweetman
- College of Science and Engineering, Flinders University of South Australia, Adelaide, South Australia 5042, Australia
| | - Christopher D Waterman
- College of Science and Engineering, Flinders University of South Australia, Adelaide, South Australia 5042, Australia
| | - Barry M Rainbird
- College of Science and Engineering, Flinders University of South Australia, Adelaide, South Australia 5042, Australia
| | - Penelope M C Smith
- Department of Animal, Plant, and Soil Sciences, School of Life Sciences, Latrobe University, Bundoora, Victoria 3083, Australia
| | - Colin D Jenkins
- College of Science and Engineering, Flinders University of South Australia, Adelaide, South Australia 5042, Australia
| | - David A Day
- College of Science and Engineering, Flinders University of South Australia, Adelaide, South Australia 5042, Australia
| | - Kathleen L Soole
- College of Science and Engineering, Flinders University of South Australia, Adelaide, South Australia 5042, Australia
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33
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Liu G, Li B, Wang Y, Wei B, He C, Liu D, Shi H. Novel Role of Ethanol in Delaying Postharvest Physiological Deterioration and Keeping Quality in Cassava. FOOD BIOPROCESS TECH 2019. [DOI: 10.1007/s11947-019-02330-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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34
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Athanase N, Rob M. Gene action and heterosis in F 1 clonal progenies of cassava for β-Carotene and farmers' preferred traits. Heliyon 2019; 5:e01807. [PMID: 31249885 PMCID: PMC6584772 DOI: 10.1016/j.heliyon.2019.e01807] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 04/24/2019] [Accepted: 05/21/2019] [Indexed: 11/26/2022] Open
Abstract
Gene action and heterosis provides information to assist breeder for selecting and generating improved plant recombinants. This study aimed at determining the gene action of selected cassava traits. The F1 clones exhibited considerable phenotypic variability between families and offsprings. The best F1 progenies had a higher amount of β-carotene (β-C) of 6.12 mg 100 g−1 against 1.32 mg 100 g−1 of the best parent. This superiority could be attributed to the over-dominance from the recombination of additive gene action and epistasis. The general combining ability (GCA) of parents and specific combining ability (SCA) of combinations were significant for different traits, and indicating the role of additive and non-additive gene action in controlling such traits. The significant GCA for β-C and postharvest physiological deterioration (PPD) indicates the role of additive gene action. The significant SCA for cassava mosaic disease (CMD) and cassava brown streak disease (CBSD) showed a predominance of non-additive gene action. The F1 progenies from the family Mavoka x Garukunsubire expressed the highest positive heterosis for CMD, dry matter and β-C. The high positive heterosis for β-C and DMC could be linked to transgressive segregation, because one of the parents was poor combiner.
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Affiliation(s)
- Nduwumuremyi Athanase
- Rwanda Agriculture and Animal Resources Development Board (RAB), Kigali, P.O. Box 5016, Rwanda.,University of KwaZulu-Natal, African Centre for Crop Improvement (ACCI), Scottville, Private Box X01, 3029, South Africa
| | - Melis Rob
- University of KwaZulu-Natal, African Centre for Crop Improvement (ACCI), Scottville, Private Box X01, 3029, South Africa
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An F, Baker MR, Qin Y, Chen S, Li QX. Relevance of Class I α-Mannosidases to Cassava Postharvest Physiological Deterioration. ACS OMEGA 2019; 4:8739-8746. [PMID: 31459963 PMCID: PMC6648743 DOI: 10.1021/acsomega.8b03558] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 05/09/2019] [Indexed: 05/27/2023]
Abstract
Class I α-mannosidases (MNSs) play important roles in protein N-glycosylation. However, no data are currently available about MNSs in cassava (Manihot esculenta), of which the functions are therefore not known, particularly in relevance to postharvest physiological deterioration (PPD). A total of seven genes were identified from the cassava genome in the present study. Two (MeMNS2 and MeMNS6) of the seven genes may be pseudogenes, as indicated by sequence alignment and exon-intron organizations. Five MNSs could be classified into three subfamilies. Tissue-specific expression analysis revealed that MNS genes have distinct expression patterns in different tissues between sugar cassava and cultivated cassava varieties, indicating their functional diversity. A PPD response and defense model was proposed based on the transcription data of MNSs and genes involved in reactive oxygen species, signal transduction, and cell wall remodeling. The findings help in the understanding of PPD responses in cassava.
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Affiliation(s)
- Feifei An
- Tropical
Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural
Sciences/Key Laboratory of Ministry of Agriculture for Germplasm Resources
Conservation and Utilization of Cassava, Danzhou, Hainan 571737, China
- Department
of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
| | - Margaret R. Baker
- Department
of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
| | - Yuling Qin
- Tropical
Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural
Sciences/Key Laboratory of Ministry of Agriculture for Germplasm Resources
Conservation and Utilization of Cassava, Danzhou, Hainan 571737, China
| | - Songbi Chen
- Tropical
Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural
Sciences/Key Laboratory of Ministry of Agriculture for Germplasm Resources
Conservation and Utilization of Cassava, Danzhou, Hainan 571737, China
| | - Qing X. Li
- Department
of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
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Coelho DG, Fonseca KS, de Mélo Neto DF, de Andrade MT, Coelho Junior LF, Ferreira-Silva SL, Simões ADN. Association of preharvest management with oxidative protection and enzymatic browning in minimally processed cassava. J Food Biochem 2019; 43:e12840. [PMID: 31353528 DOI: 10.1111/jfbc.12840] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 02/08/2019] [Accepted: 03/01/2019] [Indexed: 01/30/2023]
Abstract
The aim of this study was to examine oxidative protection and enzymatic browning in the storage of minimally processed cassava and their relationship with population density and harvest age. Population densities were 1.0, 1.25, 1.5, and 1.75 plants m-2 . After being harvested at 300, 360, or 420 days after planting, cassava were minimally processed and stored at 5 ± 2°C. It was observed that superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) play key roles in the tolerance of young roots to browning. Planting density, however, does not appear to be a key factor modulating the activity of the enzymes studied. PRACTICAL APPLICATIONS: Younger harvested cassava roots, harvested at 300 days, are more tolerant to enzymatic browning. This appears to be in part due to enzymatic activity modulation of the SOD, CAT, and POD enzymes. In addition, it has been demonstrated that agronomic techniques aimed at increasing productivity, such as increasing the planting density of cassava, do not alter the biomarkers of postharvest quality. In summary, evidence that field management may be an efficient approach to improving the conservation of minimally processed cassava is provided. We believe that the findings of this paper will be of great interest regarding the influence of field management on the postharvest quality of freshly cut cassava and will also provide applicable results relating to its production chain.
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Drapal M, Barros de Carvalho E, Ovalle Rivera TM, Becerra Lopez-Lavalle LA, Fraser PD. Capturing Biochemical Diversity in Cassava ( Manihot esculenta Crantz) through the Application of Metabolite Profiling. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:986-993. [PMID: 30557498 PMCID: PMC6346375 DOI: 10.1021/acs.jafc.8b04769] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 12/10/2018] [Accepted: 12/17/2018] [Indexed: 05/19/2023]
Abstract
Cassava ( Manihot esculenta Crantz) is the predominant staple food in Sub-Saharan Africa (SSA) and an industrial crop in South East Asia. Despite focused breeding efforts for increased yield, resistance, and nutritional value, cassava breeding has not advanced at the same rapidity as other staple crops. In the present study, metabolomic techniques were implemented to characterize the chemotypes of selected cassava accessions and assess potential resources for the breeding program. The metabolite data analyzed was applied to describe the biochemical diversity available in the panel, identifying South American accessions as the most diverse. Genotypes with distinct phenotypic traits showed a representative metabolite profile and could be clearly identified, even if the phenotypic trait was a root characteristic, e.g., high amylose content.
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Affiliation(s)
- Margit Drapal
- School
of Biological Sciences, Royal Holloway,
University of London, Egham Hill, Egham, Surrey TW20 0EX, U.K.
| | | | | | | | - Paul D. Fraser
- School
of Biological Sciences, Royal Holloway,
University of London, Egham Hill, Egham, Surrey TW20 0EX, U.K.
- E-mail: . Phone: +44 1784
443894
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Simões ADN, Coelho DG, Fonseca KS, Barros Júnior AP, Ferreira-Silva SL, Freire CS, Silva EFD. Effect of multilayer nylon packages on the oxidative damage of minimally processed yam. BRAZILIAN JOURNAL OF FOOD TECHNOLOGY 2019. [DOI: 10.1590/1981-6723.09017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract Appropriate storage packaging is an important aspect to minimize physiological deterioration and enhance the shelf-life of minimally processed products. Thus, the goal of this study was to evaluate the physiological and biochemical changes associated with the quality loss of minimally processed yam, maintained in two different packages at 5 ± 2 °C. The yam roots were selected, washed and conserved at 8 ± 2 °C for 24 hours. They were then peeled and cut into slices about 3 cm thick and minimally processed. Approximately 300 g of minimally processed yam roots were packed in polypropylene (PP, 4 μm thick) and multilayer nylon (NY, 15 μm thick) 15 cm wide x 20 cm long bags, which were stored at 5 ± 2 °C for 14 days. The minimally processed yam conserved in PP packaging presented fluorescence on the surface of the segments, characteristic symptoms of Pseudomonas spp., and showed higher peroxidase and catalase activities. The nylon packaging was more efficient in reducing oxidative damage and also inhibited polyphenol oxidase activity and decreased the accumulation of soluble proteins, resulting in decreased deterioration during storage. Thus, the quality of the minimally processed yam maintained in NY packaging was conserved for 14 days at 5 ± 2 °C.
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Beyene G, Solomon FR, Chauhan RD, Gaitán‐Solis E, Narayanan N, Gehan J, Siritunga D, Stevens RL, Jifon J, Van Eck J, Linsler E, Gehan M, Ilyas M, Fregene M, Sayre RT, Anderson P, Taylor NJ, Cahoon EB. Provitamin A biofortification of cassava enhances shelf life but reduces dry matter content of storage roots due to altered carbon partitioning into starch. PLANT BIOTECHNOLOGY JOURNAL 2018; 16:1186-1200. [PMID: 29193665 PMCID: PMC5978869 DOI: 10.1111/pbi.12862] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 11/02/2017] [Accepted: 11/06/2017] [Indexed: 05/21/2023]
Abstract
Storage roots of cassava (Manihot esculenta Crantz), a major subsistence crop of sub-Saharan Africa, are calorie rich but deficient in essential micronutrients, including provitamin A β-carotene. In this study, β-carotene concentrations in cassava storage roots were enhanced by co-expression of transgenes for deoxy-d-xylulose-5-phosphate synthase (DXS) and bacterial phytoene synthase (crtB), mediated by the patatin-type 1 promoter. Storage roots harvested from field-grown plants accumulated carotenoids to ≤50 μg/g DW, 15- to 20-fold increases relative to roots from nontransgenic plants. Approximately 85%-90% of these carotenoids accumulated as all-trans-β-carotene, the most nutritionally efficacious carotenoid. β-Carotene-accumulating storage roots displayed delayed onset of postharvest physiological deterioration, a major constraint limiting utilization of cassava products. Large metabolite changes were detected in β-carotene-enhanced storage roots. Most significantly, an inverse correlation was observed between β-carotene and dry matter content, with reductions of 50%-60% of dry matter content in the highest carotenoid-accumulating storage roots of different cultivars. Further analysis confirmed a concomitant reduction in starch content and increased levels of total fatty acids, triacylglycerols, soluble sugars and abscisic acid. Potato engineered to co-express DXS and crtB displayed a similar correlation between β-carotene accumulation, reduced dry matter and starch content and elevated oil and soluble sugars in tubers. Transcriptome analyses revealed a reduced expression of genes involved in starch biosynthesis including ADP-glucose pyrophosphorylase genes in transgenic, carotene-accumulating cassava roots relative to nontransgenic roots. These findings highlight unintended metabolic consequences of provitamin A biofortification of starch-rich organs and point to strategies for redirecting metabolic flux to restore starch production.
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Affiliation(s)
- Getu Beyene
- Donald Danforth Plant Science CenterSt. LouisMOUSA
| | - Felix R. Solomon
- Donald Danforth Plant Science CenterSt. LouisMOUSA
- Center for Plant Science InnovationDepartment of BiochemistryE318 Beadle CenterUniversity of Nebraska‐LincolnLincolnNEUSA
| | | | | | | | | | - Dimuth Siritunga
- Department of BiologyUniversity of Puerto RicoMayaguezPuerto Rico
| | | | - John Jifon
- Department of Horticultural SciencesTexas A&M AgriLife Research and Extension CenterWeslacoTXUSA
| | | | | | - Malia Gehan
- Donald Danforth Plant Science CenterSt. LouisMOUSA
| | - Muhammad Ilyas
- Donald Danforth Plant Science CenterSt. LouisMOUSA
- Present address:
University of ArizonaTucsonAZUSA
| | - Martin Fregene
- Donald Danforth Plant Science CenterSt. LouisMOUSA
- Present address:
African Development BankAbidjan 01Côte d'Ivoire
| | - Richard T. Sayre
- New Mexico ConsortiumLos Alamos National LaboratoryLos AlamosNMUSA
| | | | | | - Edgar B. Cahoon
- Donald Danforth Plant Science CenterSt. LouisMOUSA
- Center for Plant Science InnovationDepartment of BiochemistryE318 Beadle CenterUniversity of Nebraska‐LincolnLincolnNEUSA
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Nduwumuremyi A, Melis R, Shanahan P, Theodore A. Genetic inheritance of pulp colour and selected traits of cassava (Manihot esculenta Crantz) at early generation selection. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:3190-3197. [PMID: 29230819 DOI: 10.1002/jsfa.8825] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 12/01/2017] [Accepted: 12/06/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND The early generation selection of cassava quantitative and qualitative traits saves breeding resources as it can shorten breeding schemes. Inheritance analysis provides important breeding information for developing new improved varieties. This study aimed at developing an F1 segregating cassava population and determining mode of gene action of pulp colour and selected traits at early generation selection (F1 seedling and clones). RESULTS The 15 families exhibited significant (P < 0.05) phenotypic variation between offspring. The general combining ability (GCA) was significant for all traits except cassava brown streak disease on leaves, whereas specific combining ability (SCA) was significant for all evaluated traits. The Garukansubire and Gitamisi genotypes were the best general combiners for improving fresh storage root yield, while G1 and G2 were the best general combiners for improved carotenoid (yellow/orange pulp colour) and delayed physiological postharvest deterioration. The pulp colour had the highest GCA/SCA ratio and percent sum of squares due to GCA. CONCLUSION The 15 F1 families exhibited essential genetic diversity for cassava improvement. The expression of most cassava traits was controlled by both additive and non-additive gene action. The study elucidated the role of dominance effects over the additive effects for the evaluated traits. However, the pulp colour was predominantly controlled by additive gene action. This implies the possibility of improving cassava through conventional breeding using recurrent selection for most traits. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Athanase Nduwumuremyi
- African Centre for Crop Improvement (ACCI), University of KwaZulu-Natal, Scottville, South Africa
- Rwanda Agriculture Board (RAB), Kigali, Rwanda
| | - Rob Melis
- African Centre for Crop Improvement (ACCI), University of KwaZulu-Natal, Scottville, South Africa
| | - Paul Shanahan
- African Centre for Crop Improvement (ACCI), University of KwaZulu-Natal, Scottville, South Africa
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Hu W, Yan Y, Tie W, Ding Z, Wu C, Ding X, Wang W, Xia Z, Guo J, Peng M. Genome-Wide Analyses of Calcium Sensors Reveal Their Involvement in Drought Stress Response and Storage Roots Deterioration after Harvest in Cassava. Genes (Basel) 2018; 9:genes9040221. [PMID: 29671773 PMCID: PMC5924563 DOI: 10.3390/genes9040221] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 04/01/2018] [Accepted: 04/12/2018] [Indexed: 12/18/2022] Open
Abstract
Calcium (Ca2+) plays a crucial role in plant development and responses to environmental stimuli. Currently, calmodulins (CaMs), calmodulin-like proteins (CMLs), and calcineurin B-like proteins (CBLs), such as Ca2+ sensors, are not well understood in cassava (Manihotesculenta Crantz), an important tropical crop. In the present study, 8 CaMs, 48 CMLs, and 9 CBLs were genome-wide identified in cassava, which were divided into two, four, and four groups, respectively, based on evolutionary relationship, protein motif, and gene structure analyses. Transcriptomic analysis revealed the expression diversity of cassava CaMs-CMLs-CBLs in distinct tissues and in response to drought stress in different genotypes. Generally, cassava CaMs-CMLs-CBLs showed different expression profiles between cultivated varieties (Arg7 and SC124) and wild ancestor (W14) after drought treatment. In addition, numerous CaMs-CMLs-CBLs were significantly upregulated at 6 h, 12 h, and 48 h after harvest, suggesting their possible role during storage roots (SR) deterioration. Further interaction network and co-expression analyses suggested that a CBL-mediated interaction network was widely involved in SR deterioration. Taken together, this study provides new insights into CaMs-CMLs-CBLs-mediated drought adaption and SR deterioration at the transcription level in cassava, and identifies some candidates for the genetic improvement of cassava.
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Affiliation(s)
- Wei Hu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou 571101, Hainan, China.
| | - Yan Yan
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou 571101, Hainan, China.
| | - Weiwei Tie
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou 571101, Hainan, China.
| | - Zehong Ding
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou 571101, Hainan, China.
| | - Chunlai Wu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou 571101, Hainan, China.
| | - Xupo Ding
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou 571101, Hainan, China.
| | - Wenquan Wang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou 571101, Hainan, China.
| | - Zhiqiang Xia
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou 571101, Hainan, China.
| | - Jianchun Guo
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou 571101, Hainan, China.
| | - Ming Peng
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou 571101, Hainan, China.
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Ligaba-Osena A, Jones J, Donkor E, Chandrayan S, Pole F, Wu CH, Vieille C, Adams MWW, Hankoua BB. Novel Bioengineered Cassava Expressing an Archaeal Starch Degradation System and a Bacterial ADP-Glucose Pyrophosphorylase for Starch Self-Digestibility and Yield Increase. FRONTIERS IN PLANT SCIENCE 2018; 9:192. [PMID: 29541080 PMCID: PMC5836596 DOI: 10.3389/fpls.2018.00192] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 02/01/2018] [Indexed: 11/06/2023]
Abstract
To address national and global low-carbon fuel targets, there is great interest in alternative plant species such as cassava (Manihot esculenta), which are high-yielding, resilient, and are easily converted to fuels using the existing technology. In this study the genes encoding hyperthermophilic archaeal starch-hydrolyzing enzymes, α-amylase and amylopullulanase from Pyrococcus furiosus and glucoamylase from Sulfolobus solfataricus, together with the gene encoding a modified ADP-glucose pyrophosphorylase (glgC) from Escherichia coli, were simultaneously expressed in cassava roots to enhance starch accumulation and its subsequent hydrolysis to sugar. A total of 13 multigene expressing transgenic lines were generated and characterized phenotypically and genotypically. Gene expression analysis using quantitative RT-PCR showed that the microbial genes are expressed in the transgenic roots. Multigene-expressing transgenic lines produced up to 60% more storage root yield than the non-transgenic control, likely due to glgC expression. Total protein extracted from the transgenic roots showed up to 10-fold higher starch-degrading activity in vitro than the protein extracted from the non-transgenic control. Interestingly, transgenic tubers released threefold more glucose than the non-transgenic control when incubated at 85°C for 21-h without exogenous application of thermostable enzymes, suggesting that the archaeal enzymes produced in planta maintain their activity and thermostability.
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Affiliation(s)
- Ayalew Ligaba-Osena
- College of Agriculture and Related Sciences, Delaware State University, Dover, DE, United States
| | - Jenna Jones
- College of Agriculture and Related Sciences, Delaware State University, Dover, DE, United States
| | - Emmanuel Donkor
- College of Agriculture and Related Sciences, Delaware State University, Dover, DE, United States
| | - Sanjeev Chandrayan
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA, United States
| | - Farris Pole
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA, United States
| | - Chang-Hao Wu
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA, United States
| | - Claire Vieille
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI, United States
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, United States
| | - Michael W. W. Adams
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA, United States
| | - Bertrand B. Hankoua
- College of Agriculture and Related Sciences, Delaware State University, Dover, DE, United States
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Dahal K, Vanlerberghe GC. Improved chloroplast energy balance during water deficit enhances plant growth: more crop per drop. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:1183-1197. [PMID: 29281082 PMCID: PMC6018952 DOI: 10.1093/jxb/erx474] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 12/07/2017] [Indexed: 05/02/2023]
Abstract
The non-energy-conserving alternative oxidase (AOX) respiration of plant mitochondria is known to interact with chloroplast photosynthesis. This may have consequences for growth, particularly under sub-optimal conditions when energy imbalances can impede photosynthesis. This hypothesis was tested by comparing the metabolism and growth of wild-type Nicotiana tabacum with that of AOX knockdown and overexpression lines during a prolonged steady-state mild to moderate water deficit. Under moderate water deficit, the AOX amount was an important determinant of the rate of both mitochondrial respiration in the light and net photosynthetic CO2 assimilation (A) at the growth irradiance. In particular, AOX respiration was necessary to maintain optimal proton and electron fluxes at the chloroplast thylakoid membrane, which in turn prevented a water-deficit-induced biochemical limitation of photosynthesis. As a result of differences in A, AOX overexpressors gained more biomass and knockdowns gained less biomass than wild-type during moderate water deficit. Biomass partitioning also differed, with the overexpressors having a higher percentage, and the knockdowns having a lower percentage, of total above-ground biomass in reproductive tissue than wild-type. The results establish that improving chloroplast energy balance by using a non-energy-conserving respiratory electron sink can increase photosynthesis and growth during prolonged water deficit.
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Affiliation(s)
- Keshav Dahal
- Department of Biological Sciences and Department of Cell and Systems Biology, University of Toronto Scarborough, Toronto, Ontario, Canada
| | - Greg C Vanlerberghe
- Department of Biological Sciences and Department of Cell and Systems Biology, University of Toronto Scarborough, Toronto, Ontario, Canada
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Genome-Wide Analysis of the GRF Family Reveals Their Involvement in Abiotic Stress Response in Cassava. Genes (Basel) 2018; 9:genes9020110. [PMID: 29461467 PMCID: PMC5852606 DOI: 10.3390/genes9020110] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 02/13/2018] [Accepted: 02/15/2018] [Indexed: 02/06/2023] Open
Abstract
GENERAL REGULATORY FACTOR (GRF) proteins play vital roles in the regulation of plant growth, development, and response to abiotic stress. However, little information is known for this gene family in cassava (Manihot esculenta). In this study, 15 MeGRFs were identified from the cassava genome and were clustered into the ε and the non-ε groups according to phylogenetic, conserved motif, and gene structure analyses. Transcriptomic analyses showed eleven MeGRFs with constitutively high expression in stems, leaves, and storage roots of two cassava genotypes. Expression analyses revealed that the majority of GRFs showed transcriptional changes under cold, osmotic, salt, abscisic acid (ABA), and H2O2 treatments. Six MeGRFs were found to be commonly upregulated by abiotic stress, ABA, and H2O2 treatments, which may be the converging points of multiple signaling pathways. Interaction network analysis identified 18 possible interactors of MeGRFs. Taken together, this study elucidates the transcriptional control of MeGRFs in tissue development and the responses of abiotic stress and related signaling in cassava. Some constitutively expressed, tissue-specific, and abiotic stress-responsive candidate MeGRF genes were identified for the further genetic improvement of crops.
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45
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Mirto A, Iannuzzi F, Carillo P, Ciarmiello LF, Woodrow P, Fuggi A. Metabolic characterization and antioxidant activity in sweet cherry (Prunus avium L.) Campania accessions. Food Chem 2018; 240:559-566. [DOI: 10.1016/j.foodchem.2017.07.162] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 06/29/2017] [Accepted: 07/31/2017] [Indexed: 10/19/2022]
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46
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Ou W, Mao X, Huang C, Tie W, Yan Y, Ding Z, Wu C, Xia Z, Wang W, Zhou S, Li K, Hu W. Genome-Wide Identification and Expression Analysis of the KUP Family under Abiotic Stress in Cassava ( Manihot esculenta Crantz). Front Physiol 2018; 9:17. [PMID: 29416511 PMCID: PMC5787556 DOI: 10.3389/fphys.2018.00017] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 01/08/2018] [Indexed: 12/30/2022] Open
Abstract
KT/HAK/KUP (KUP) family is responsible for potassium ion (K+) transport, which plays a vital role in the response of plants to abiotic stress by maintaining osmotic balance. However, our understanding of the functions of the KUP family in the drought-resistant crop cassava (Manihot esculenta Crantz) is limited. In the present study, 21 cassava KUP genes (MeKUPs) were identified and classified into four clusters based on phylogenetic relationships, conserved motifs, and gene structure analyses. Transcriptome analysis revealed the expression diversity of cassava KUPs in various tissues of three genotypes. Comparative transcriptome analysis showed that the activation of MeKUP genes by drought was more in roots than that in leaves of Arg7 and W14 genotypes, whereas less in roots than that in leaves of SC124 variety. These findings indicate that different cassava genotypes utilize various drought resistance mechanism mediated by KUP genes. Specific KUP genes showed broad upregulation after exposure to salt, osmotic, cold, H2O2, and abscisic acid (ABA) treatments. Taken together, this study provides insights into the KUP-mediated drought response of cassava at transcription levels and identifies candidate genes that may be utilized in improving crop tolerance to abiotic stress.
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Affiliation(s)
- Wenjun Ou
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, China
| | - Xiang Mao
- Wuhan Centre for Disease Prevention and Control, Wuhan, China
| | - Chao Huang
- College of Life Science and Technology, Huazhong University of Science and Technology (HUST), Wuhan, China
| | - Weiwei Tie
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Yan Yan
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Zehong Ding
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Chunlai Wu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Zhiqiang Xia
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Wenquan Wang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Shiyi Zhou
- Hubei Key Laboratory of Purification and Application of Plant Anticancer Active Ingredients, Chemistry and Biology Science College, Hubei University of Education, Wuhan, China
| | - Kaimian Li
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, China.,Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Wei Hu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
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Nduwumuremyi A, Melis R, Shanahan P, Theodore A. Interaction of genotype and environment effects on important traits of cassava ( Manihot esculenta Crantz). ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.cj.2017.02.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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48
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Lei N, Yu X, Li S, Zeng C, Zou L, Liao W, Peng M. Phylogeny and expression pattern analysis of TCP transcription factors in cassava seedlings exposed to cold and/or drought stress. Sci Rep 2017; 7:10016. [PMID: 28855620 PMCID: PMC5577251 DOI: 10.1038/s41598-017-09398-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 07/26/2017] [Indexed: 12/21/2022] Open
Abstract
The TCP transcription factors usually act as integrators of multiple growth regulatory and environmental stimuli. However, little is known about this gene family in the important tropical crop cassava (Manihot esculenta). In this study, 36 TCP genes were identified and renamed based on cassava whole-genome sequence and their sequence similarity with Arabidopsis TCPs. Typical TCP domains were detected in these proteins by multiple sequence alignment analysis. Evolutionary analysis indicated that MeTCPs could be divided into 8 subgroups, which was further supported by gene structure and conserved motif analyses. qRT-PCR analysis revealed tissue-specific and hormone-responsive expression patterns of MeTCP genes. Moreover, with global expression and promoter analysis, we found that MeTCPs showed similar or distinct expression patterns under cold and/or drought stress, suggesting that they might participate in distinct signaling pathways. Our study provides the first comprehensive analysis of TCP gene family in the cassava genome. The data will be useful for uncovering the potential functions of MeTCP genes, and their possible roles in mediating hormone and abiotic stress responses in cassava.
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Affiliation(s)
- Ning Lei
- Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, 570228, China
| | - Xiang Yu
- National Key Laboratory of Plant Molecular Genetics and National Center for Plant Gene Research (Shanghai), Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, 200032, China.,Department of Biology, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Shuxia Li
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China
| | - Changying Zeng
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China
| | - Liangping Zou
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China
| | - Wenbin Liao
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China
| | - Ming Peng
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China.
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49
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Utsumi Y, Utsumi C, Tanaka M, Ha VT, Matsui A, Takahashi S, Seki M. Formation of friable embryogenic callus in cassava is enhanced under conditions of reduced nitrate, potassium and phosphate. PLoS One 2017; 12:e0180736. [PMID: 28806727 PMCID: PMC5555663 DOI: 10.1371/journal.pone.0180736] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 06/20/2017] [Indexed: 01/22/2023] Open
Abstract
Agrobacterium-mediated transformation is an important research tool for the genetic improvement of cassava. The induction of friable embryogenic callus (FEC) is considered as a key step in cassava transformation. In the present study, the media composition was optimized for enhancing the FEC induction, and the effect of the optimized medium on gene expression was evaluated. In relative comparison to MS medium, results demonstrated that using a medium with reducing nutrition (a 10-fold less concentration of nitrogen, potassium, and phosphate), the increased amount of vitamin B1 (10 mg/L) and the use of picrolam led to reprogram non-FEC to FEC. Gene expression analyses revealed that FEC on modified media increased the expression of genes related to the regulation of polysaccharide biosynthesis and breakdown of cell wall components in comparison to FEC on normal CIM media, whereas the gene expression associated with energy flux was not dramatically altered. It is hypothesized that we reprogram non-FEC to FEC under low nitrogen, potassium and phosphate and high vitamin B1. These findings were more effective in inducing FEC formation than the previous protocol. It might contribute to development of an efficient transformation strategy in cassava.
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Affiliation(s)
- Yoshinori Utsumi
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, Japan
| | - Chikako Utsumi
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, Japan
- Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology (JST), 4-1-8 Honcho, Kawaguchi, Saitama, Japan
| | - Maho Tanaka
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, Japan
| | - Vu The Ha
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, Japan
| | - Akihiro Matsui
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, Japan
| | - Satoshi Takahashi
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, Japan
| | - Motoaki Seki
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, Japan
- Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology (JST), 4-1-8 Honcho, Kawaguchi, Saitama, Japan
- Kihara Institute for Biological Research, Yokohama City University, 641–12 Maioka-cho, Totsuka-ku, Yokohama, Kanagawa, Japan
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50
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Liu S, Zainuddin IM, Vanderschuren H, Doughty J, Beeching JR. RNAi inhibition of feruloyl CoA 6'-hydroxylase reduces scopoletin biosynthesis and post-harvest physiological deterioration in cassava (Manihot esculenta Crantz) storage roots. PLANT MOLECULAR BIOLOGY 2017; 94:185-195. [PMID: 28315989 PMCID: PMC5437147 DOI: 10.1007/s11103-017-0602-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 03/09/2017] [Indexed: 05/06/2023]
Abstract
Cassava (Manihot esculenta Crantz) is a major world crop, whose storage roots provide food for over 800 million throughout the humid tropics. Despite many advantages as a crop, the development of cassava is seriously constrained by the rapid post-harvest physiological deterioration (PPD) of its roots that occurs within 24-72 h of harvest, rendering the roots unpalatable and unmarketable. PPD limits cassava's marketing possibilities in countries that are undergoing increased development and urbanisation due to growing distances between farms and consumers. The inevitable wounding of the roots caused by harvesting triggers an oxidative burst that spreads throughout the cassava root, together with the accumulation of secondary metabolites including phenolic compounds, of which the coumarin scopoletin (7-hydroxy-6-methoxy-2H-1-benzopyran-2-one) is the most abundant. Scopoletin oxidation yields a blue-black colour, which suggests its involvement in the discoloration observed during PPD. Feruloyl CoA 6'-hydroxylase is a controlling enzyme in the biosynthesis of scopoletin. The cassava genome contains a seven membered family of feruloyl CoA 6'-hydroxylase genes, four of which are expressed in the storage root and, of these, three were capable of functionally complementing Arabidopsis T-DNA insertion mutants in this gene. A RNA interference construct, designed to a highly conserved region of these genes, was used to transform cassava, where it significantly reduced feruloyl CoA 6'-hydroxylase gene expression, scopoletin accumulation and PPD symptom development. Collectively, our results provide evidence that scopoletin plays a major functional role in the development of PPD symptoms, rather than merely paralleling symptom development in the cassava storage root.
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Affiliation(s)
- Shi Liu
- Department of Biology and Biochemistry, University of Bath, Bath, BA2 7AY, UK.
| | - Ima M Zainuddin
- Department of Biology, Plant Biotechnology, Eidgenössische Technische Hochschule (ETH) Zurich, Universitätstrasse 2, 8092, Zurich, Switzerland
- Research Center for Biotechnology, Indonesian Institute of Sciences, Complex CSC-LIPI Jl. Raya Bogor Km 46, Cibinong, Bogor, West Java, 16911, Indonesia
| | - Herve Vanderschuren
- Department of Biology, Plant Biotechnology, Eidgenössische Technische Hochschule (ETH) Zurich, Universitätstrasse 2, 8092, Zurich, Switzerland
- Plant Genetics, AgroBioChem Department, Gembloux Agro-BioTech, University of Liège, 4000, Liège, Belgium
| | - James Doughty
- Department of Biology and Biochemistry, University of Bath, Bath, BA2 7AY, UK
| | - John R Beeching
- Department of Biology and Biochemistry, University of Bath, Bath, BA2 7AY, UK
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