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Cooper C, Folta KM. Thai Oakleaf Lettuce Phenocopies a Phytochrome B Mutant. BIOLOGY 2024; 13:390. [PMID: 38927270 PMCID: PMC11200548 DOI: 10.3390/biology13060390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 05/07/2024] [Accepted: 05/22/2024] [Indexed: 06/28/2024]
Abstract
Photomorphogenic development in seedlings may be diagnostic of future plant performance. In this report, we characterize the Thai Oakleaf lettuce genotype, as it exhibited abnormalities in photomorphogenic development that were the most conspicuous under red light, including defects in hypocotyl growth inhibition, decreased cotyledon expansion, and constitutive shade avoidance tendencies. These observations are consistent with defects in red light sensing through the phytochrome B (phyB) photoreceptor system. This genotype is sold commercially as a heat-tolerant variety, which aligns with the evidence that phyB acts as a thermosensor.
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Affiliation(s)
| | - Kevin M. Folta
- Horticultural Sciences Department, University of Florida, Gainesville, FL 32611, USA
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2
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Han R, Ma L, Terzaghi W, Guo Y, Li J. Molecular mechanisms underlying coordinated responses of plants to shade and environmental stresses. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 117:1893-1913. [PMID: 38289877 DOI: 10.1111/tpj.16653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 01/09/2024] [Accepted: 01/17/2024] [Indexed: 02/01/2024]
Abstract
Shade avoidance syndrome (SAS) is triggered by a low ratio of red (R) to far-red (FR) light (R/FR ratio), which is caused by neighbor detection and/or canopy shade. In order to compete for the limited light, plants elongate hypocotyls and petioles by deactivating phytochrome B (phyB), a major R light photoreceptor, thus releasing its inhibition of the growth-promoting transcription factors PHYTOCHROME-INTERACTING FACTORs. Under natural conditions, plants must cope with abiotic stresses such as drought, soil salinity, and extreme temperatures, and biotic stresses such as pathogens and pests. Plants have evolved sophisticated mechanisms to simultaneously deal with multiple environmental stresses. In this review, we will summarize recent major advances in our understanding of how plants coordinately respond to shade and environmental stresses, and will also discuss the important questions for future research. A deep understanding of how plants synergistically respond to shade together with abiotic and biotic stresses will facilitate the design and breeding of new crop varieties with enhanced tolerance to high-density planting and environmental stresses.
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Affiliation(s)
- Run Han
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, Frontiers Science Center for Molecular Design Breeding (MOE), China Agricultural University, Beijing, 100193, China
| | - Liang Ma
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, Frontiers Science Center for Molecular Design Breeding (MOE), China Agricultural University, Beijing, 100193, China
| | - William Terzaghi
- Department of Biology, Wilkes University, Wilkes-Barre, Pennsylvania, 18766, USA
| | - Yan Guo
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, Frontiers Science Center for Molecular Design Breeding (MOE), China Agricultural University, Beijing, 100193, China
| | - Jigang Li
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, Frontiers Science Center for Molecular Design Breeding (MOE), China Agricultural University, Beijing, 100193, China
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3
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Sharma A, Pridgeon AJ, Liu W, Segers F, Sharma B, Jenkins GI, Franklin KA. ELONGATED HYPOCOTYL5 (HY5) and HY5 HOMOLOGUE (HYH) maintain shade avoidance suppression in UV-B. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 115:1394-1407. [PMID: 37243898 PMCID: PMC10953383 DOI: 10.1111/tpj.16328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 05/17/2023] [Accepted: 05/23/2023] [Indexed: 05/29/2023]
Abstract
Reductions in red to far-red ratio (R:FR) provide plants with an unambiguous signal of vegetational shade and are monitored by phytochrome photoreceptors. Plants integrate this information with other environmental cues to determine the proximity and density of encroaching vegetation. Shade-sensitive species respond to reductions in R:FR by initiating a suite of developmental adaptations termed shade avoidance. These include the elongation of stems to facilitate light foraging. Hypocotyl elongation is driven by increased auxin biosynthesis promoted by PHYTOCHROME INTERACTING FACTORs (PIF) 4, 5 and 7. UV-B perceived by the UV RESISTANCE LOCUS 8 (UVR8) photoreceptor rapidly inhibits shade avoidance, in part by suppressing PIF4/5 transcript accumulation and destabilising PIF4/5 protein. Here, we show that longer-term inhibition of shade avoidance is sustained by ELONGATED HYPOCOTYL 5 (HY5) and HY5 HOMOLOGUE (HYH), which regulate transcriptional reprogramming of genes involved in hormone signalling and cell wall modification. HY5 and HYH are elevated in UV-B and suppress the expression of XYLOGLUCAN ENDOTRANSGLUCOSYLASE/HYDROLASE (XTH) genes involved in cell wall loosening. They additionally increase expression GA2-OXIDASE1 (GA2ox1) and GA2ox2, encoding gibberellin catabolism enzymes that act redundantly to stabilise the PIF-inhibiting DELLA proteins. UVR8 therefore regulates temporally distinct signalling pathways to first rapidly inhibit and subsequently maintain suppression of shade avoidance following UV-B exposure.
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Affiliation(s)
- Ashutosh Sharma
- School of Biological Sciences, Life Sciences BuildingUniversity of BristolBristolBS8 1TQUK
| | - Ashley J. Pridgeon
- School of Biological Sciences, Life Sciences BuildingUniversity of BristolBristolBS8 1TQUK
| | - Wei Liu
- School of Molecular Biosciences, College of Medical, Veterinary and Life SciencesUniversity of GlasgowGlasgowG12 8QQUK
| | - Francisca Segers
- School of Biological Sciences, Life Sciences BuildingUniversity of BristolBristolBS8 1TQUK
| | - Bhavana Sharma
- School of Biological Sciences, Life Sciences BuildingUniversity of BristolBristolBS8 1TQUK
| | - Gareth I. Jenkins
- School of Molecular Biosciences, College of Medical, Veterinary and Life SciencesUniversity of GlasgowGlasgowG12 8QQUK
| | - Keara A. Franklin
- School of Biological Sciences, Life Sciences BuildingUniversity of BristolBristolBS8 1TQUK
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4
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Begum FU, Skinner G, Smieszek SP, Budge S, Stead AD, Devlin PF. Improved chilling tolerance in glasshouse-grown potted sweet basil by end-of-production, short-duration supplementary far red light. FRONTIERS IN PLANT SCIENCE 2023; 14:1239010. [PMID: 37662150 PMCID: PMC10468977 DOI: 10.3389/fpls.2023.1239010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 07/26/2023] [Indexed: 09/05/2023]
Abstract
Sweet basil is a popular culinary herb used in many cuisines around the world and is widely grown commercially for retail as a live potted plant. However, basil is easily damaged by temperatures below 12 °C meaning plants must be transported from the grower to the retailer in a warm transport chain, adding considerable commercial cost in temperate countries. Improvement of chilling tolerance has been demonstrated in post-harvest crops such as tomato fruits and, indeed, fresh cut basil, by manipulation of the red:far red ratio of light provided to plants throughout the photoperiod and for a significant duration of the growing process in controlled environment chambers. We tested the effectiveness of periodic short-duration end-of-production supplementary far red light treatments designed for use with basil plants grown in a large scale commercial glasshouse for the live potted basil market. Four days of periodic, midday supplementary far red light given at end of production induced robust tolerance to 24 h of 4 °C cold treatment, resulting in greatly reduced visual damage, and reduced physiological markers of chilling injury including electrolyte leakage and reactive oxygen species accumulation. Antioxidant levels were also maintained at higher levels in live potted basil following this cold treatment. RNAseq-based analysis of gene expression changes associated with this response pointed to increased conversion of starch to soluble raffinose family oligosaccharide sugars; increased biosynthesis of anthocyanins and selected amino acids; inactivation of gibberellin signaling; and reduced expression of fatty acid desaturases, all previously associated with increased chilling tolerance in plants. Our findings offer an efficient, non-invasive approach to induce chilling tolerance in potted basil which is suitable for application in a large-scale commercial glasshouse.
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Affiliation(s)
- Firdous U. Begum
- Department of Biological Sciences, Royal Holloway University of London, Egham, United Kingdom
| | - George Skinner
- Department of Biological Sciences, Royal Holloway University of London, Egham, United Kingdom
| | - Sandra P. Smieszek
- Department of Biological Sciences, Royal Holloway University of London, Egham, United Kingdom
| | | | - Anthony D. Stead
- Department of Biological Sciences, Royal Holloway University of London, Egham, United Kingdom
| | - Paul F. Devlin
- Department of Biological Sciences, Royal Holloway University of London, Egham, United Kingdom
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5
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Gómez-Ocampo G, Cascales J, Medina-Fraga AL, Ploschuk EL, Mantese AI, Crocco CD, Matsusaka D, Sánchez DH, Botto JF. Transcriptomic and physiological shade avoidance responses in potato (Solanum tuberosum) plants. PHYSIOLOGIA PLANTARUM 2023; 175:e13991. [PMID: 37616016 DOI: 10.1111/ppl.13991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 07/06/2023] [Indexed: 08/25/2023]
Abstract
Plants detect competitors in shaded environments by perceiving a reduction in photosynthetically active radiation (PAR) and the reduction between the red and far-red light (R:FR) ratio and blue photons. These light signals are detected by phytochromes and cryptochromes, which trigger shade avoidance responses such as shoot and petiole elongation and lead to increased susceptibility to pathogen attack. We studied morphological, anatomical, and photosynthesis differences in potato plants (Solanum tuberosum var. Spunta) exposed to sunlight or simulated shade in a greenhouse. We found that simulated shade strongly induced stem and internode elongation with a higher production of free auxin in stems and a lower production of tubers. The mesophyll thickness of the upper leaves of plants grown in simulated shade was lower, but the epidermis was wider compared with the leaves of plants cultivated in sunlight. In addition, the photosynthesis rate was lower in the upper leaves exposed to nonsaturated irradiances and higher in the basal leaves at saturated irradiances compared with control plants. RNA-seq analysis showed that 146 and 155 genes were up- and downregulated by shade, respectively. By quantitative reverse transcription polymerase chain reaction, we confirmed that FLOWERING LOCUS T (FT), WRKY-like, and PAR1b were induced, while FLAVONOL 4-SULFOTRANSFERASE was repressed under shade. In shaded plants, leaves and tubers were more susceptible to the necrotrophic fungus Botrytis cinerea attack. Overall, our work demonstrates configurational changes between growth and defense decisions in potato plants cultivated in simulated shade.
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Affiliation(s)
- Gabriel Gómez-Ocampo
- IFEVA (CONICET-UBA), Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Jimena Cascales
- IFEVA (CONICET-UBA), Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Ana L Medina-Fraga
- IFEVA (CONICET-UBA), Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Edmundo L Ploschuk
- Cátedra de Cultivos Industriales, Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Anita I Mantese
- Cátedra de Botánica General, Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Carlos D Crocco
- IFEVA (CONICET-UBA), Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Daniel Matsusaka
- IFEVA (CONICET-UBA), Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Diego H Sánchez
- IFEVA (CONICET-UBA), Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Javier F Botto
- IFEVA (CONICET-UBA), Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
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6
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Tabatabaiepour SZ, Tahmasebi Z, Taab A, Rashidi-Monfared S. Effect of redroot pigweed interference on antioxidant enzyme and light response of common bean (Phaseolus vulgaris L.) depends on cultivars and growth stages. Sci Rep 2023; 13:4289. [PMID: 36922550 PMCID: PMC10017694 DOI: 10.1038/s41598-023-31466-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Accepted: 03/13/2023] [Indexed: 03/18/2023] Open
Abstract
Redroot Pigweed (Amaranthus retroflexus L.) is an important weed that is highly competitive with common bean. Photosynthetic pigments, the activity of antioxidant enzymes, the relative expression of a number of antioxidant enzyme and light response genes, were studied in three of common bean cultivars and in V4 and R7 stages under Redroot Pigweed free and infested. The presence of weeds reduced the content of chlorophyll, relative chlorophyll and anthocyanin of common bean leaves. With the increase of weed competition, the expression of antioxidant genes and enzymes increased, which indicates the increase of their activity in order to reduce the amount of reactive oxygen species. Among the studied antioxidant enzymes, the activity of catalase and ascorbate peroxidase produced in the leaves was higher than that of superoxide dismutase. With the increase of weed interference, the expression of phytochrome interacting factor 3 (PIF3) gene as a positive regulator of light signals is increased and the expression of phytochrome rapidly regulated1 (PAR1) gene as a negative regulator is decreased. Chlorophyll a/b-binding protein (CAB1) and auxin-responsive protein IAA8 (IAA8) genes also down-regulated with increasing competition. Along with the decrease of CAB expression in the conditions of competition with weeds, the chlorophyll a, b content also decreased. Correlation between gene expression and physiological traits related to them highlights the prominent role of CWCP in maintaining yield potential.
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Affiliation(s)
| | - Zahra Tahmasebi
- Department of Agronomy and Plant Breeding, Faculty of Agricultural, Ilam University, Ilam, Iran.
| | - Alireza Taab
- Department of Agronomy and Plant Breeding, Faculty of Agricultural, Ilam University, Ilam, Iran
| | - Sajad Rashidi-Monfared
- Agricultural Biotechnology Department, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
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7
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Lu D, Xu B, Yu Q, Liu Z, Ren M, Wang Y, Zhang S, Wu C, Shen Y. Identification of potential light deficiency response regulators in endangered species Magnolia sinostellata. Sci Rep 2022; 12:22536. [PMID: 36581613 PMCID: PMC9800573 DOI: 10.1038/s41598-022-25393-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 11/29/2022] [Indexed: 12/30/2022] Open
Abstract
Magnolia sinostellata is one of the endangered species in China and largely suffers light deficiency stress in the understory of forest. However, the weak light response molecular mechanism remains unclear. More importantly, hub genes in the molecular network have not been pinpointed. To explore potential regulators in the mechanism, weighted gene co-expression network analysis (WGCNA) was performed to analysis the trancriptome data of M. sinostellata leaves subjected to weak light with different time points. Gene co-expression analysis illustrated that module 1, 2 and 3 were closely associated with light deficiency treatment, which. Gene ontology and KEGG analyses showed that genes in module 1 mainly participated in amino and nucleotide metabolism, module 2 mostly involved in carbon fixation and module 3 mostly regulated photosynthesis related pathways, among which 6, 7 and 8 hub genes were identified, respectively. Hub genes isoform_107196 in module 1 and isoform_55976 in module 2 were unique to M. sinostellata. This study found that light deficiency inhibited photosynthesis and stress tolerance, while improved carbon metabolism and flowering related pathways in M. sinostellata, which can impact its accumulation reserves of growth and reproduction in the next season. In addition, key shade response regulators identified in this study have laid a firm foundation for further investigation of shade response molecular mechanism and protection of other shade sensitive plants.
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Affiliation(s)
- Danying Lu
- College of Landscape and Architecture, Zhejiang Agriculture and Forestry University, Hangzhou, 311300, Zhejiang, China
| | - Bin Xu
- College of Landscape and Architecture, Zhejiang Agriculture and Forestry University, Hangzhou, 311300, Zhejiang, China
| | - Qin Yu
- College of Landscape and Architecture, Zhejiang Agriculture and Forestry University, Hangzhou, 311300, Zhejiang, China
| | - Zhigao Liu
- College of Landscape and Architecture, Zhejiang Agriculture and Forestry University, Hangzhou, 311300, Zhejiang, China.
| | - Mingjie Ren
- College of Landscape and Architecture, Zhejiang Agriculture and Forestry University, Hangzhou, 311300, Zhejiang, China
| | - Yaling Wang
- Xi'an Botanical Garden of Shanxi Academy of Science, Xi'an , 710061, Shanxi, China
| | - Shouzhou Zhang
- Fairy Lake Botanical Garden, Shenzhen, 518004, Guangdong, China
| | - Chao Wu
- College of Landscape and Architecture, Zhejiang Agriculture and Forestry University, Hangzhou, 311300, Zhejiang, China
| | - Yamei Shen
- College of Landscape and Architecture, Zhejiang Agriculture and Forestry University, Hangzhou, 311300, Zhejiang, China.
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8
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Morgan BL, Donohue K. Parental methylation mediates how progeny respond to environments of parents and of progeny themselves. ANNALS OF BOTANY 2022; 130:883-899. [PMID: 36201313 PMCID: PMC9758305 DOI: 10.1093/aob/mcac125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND AND AIMS Environments experienced by both parents and offspring influence progeny traits, but the epigenetic mechanisms that regulate the balance of parental vs. progeny control of progeny phenotypes are not known. We tested whether DNA methylation in parents and/or progeny mediates responses to environmental cues experienced in both generations. METHODS Using Arabidopsis thaliana, we manipulated parental and progeny DNA methylation both chemically, via 5-azacytidine, and genetically, via mutants of methyltransferase genes, then measured progeny germination responses to simulated canopy shade in parental and progeny generations. KEY RESULTS We first found that germination of offspring responded to parental but not seed demethylation. We further found that parental demethylation reversed the parental effect of canopy in seeds with low (Cvi-1) to intermediate (Col) dormancy, but it obliterated the parental effect in seeds with high dormancy (Cvi-0). Demethylation did so by either suppressing germination of seeds matured under white-light (Cvi-1) or under canopy (Cvi-0), or by increasing the germination of seeds matured under canopy (Col). Disruption of parental methylation also prevented seeds from responding to their own light environment in one genotype (Cvi-0, most dormant), but it enabled seeds to respond to their own environment in another genotype (Cvi-1, least dormant). Using mutant genotypes, we found that both CG and non-CG DNA methylation were involved in parental effects on seed germination. CONCLUSIONS Parental methylation state influences seed germination more strongly than does the progeny's own methylation state, and it influences how seeds respond to environments of parents and progeny in a genotype-specific manner.
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Affiliation(s)
- Britany L Morgan
- University Program in Ecology Duke University, Durham, NC 27705, USA
- Center for Agricultural Synthetic Biology, University of Tennessee, Knoxville, TN 37996, USA
| | - Kathleen Donohue
- University Program in Ecology Duke University, Durham, NC 27705, USA
- Biology Department, Duke University, Durham, NC 27705, USA
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9
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Xin GY, Li LP, Wang PT, Li XY, Han YJ, Zhao X. The action of enhancing weak light capture via phototropic growth and chloroplast movement in plants. STRESS BIOLOGY 2022; 2:50. [PMID: 37676522 PMCID: PMC10441985 DOI: 10.1007/s44154-022-00066-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 10/11/2022] [Indexed: 09/08/2023]
Abstract
To cope with fluctuating light conditions, terrestrial plants have evolved precise regulation mechanisms to help optimize light capture and increase photosynthetic efficiency. Upon blue light-triggered autophosphorylation, activated phototropin (PHOT1 and PHOT2) photoreceptors function solely or redundantly to regulate diverse responses, including phototropism, chloroplast movement, stomatal opening, and leaf positioning and flattening in plants. These responses enhance light capture under low-light conditions and avoid photodamage under high-light conditions. NON-PHOTOTROPIC HYPOCOTYL 3 (NPH3) and ROOT PHOTOTROPISM 2 (RPT2) are signal transducers that function in the PHOT1- and PHOT2-mediated response. NPH3 is required for phototropism, leaf expansion and positioning. RPT2 regulates chloroplast accumulation as well as NPH3-mediated responses. NRL PROTEIN FOR CHLOROPLAST MOVEMENT 1 (NCH1) was recently identified as a PHOT1-interacting protein that functions redundantly with RPT2 to mediate chloroplast accumulation. The PHYTOCHROME KINASE SUBSTRATE (PKS) proteins (PKS1, PKS2, and PKS4) interact with PHOT1 and NPH3 and mediate hypocotyl phototropic bending. This review summarizes advances in phototropic growth and chloroplast movement induced by light. We also focus on how crosstalk in signaling between phototropism and chloroplast movement enhances weak light capture, providing a basis for future studies aiming to delineate the mechanism of light-trapping plants to improve light-use efficiency.
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Affiliation(s)
- Guang-Yuan Xin
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China
| | - Lu-Ping Li
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China
| | - Peng-Tao Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China
| | - Xin-Yue Li
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China
| | - Yuan-Ji Han
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China
| | - Xiang Zhao
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China.
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Chu HTT, Vu TN, Dinh TTT, Do PT, Chu HH, Tien TQ, Tong QC, Nguyen MH, Ha QT, Setzer WN. Effects of Supplemental Light Spectra on the Composition, Production and Antimicrobial Activity of Ocimum basilicum L. Essential Oil. Molecules 2022; 27:molecules27175599. [PMID: 36080366 PMCID: PMC9457840 DOI: 10.3390/molecules27175599] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/19/2022] [Accepted: 08/23/2022] [Indexed: 11/16/2022] Open
Abstract
This study was performed to investigate the effects of different supplemental light spectra and doses (duration and illuminance) on the essential oil of basil (Ocimum basilicum L.) cultivated in the net-house in Vietnam during four months. Ten samples of basil aerial parts were hydrodistilled to obtain essential oils which had the average yields from 0.88 to 1.30% (v/w, dry). The oils analyzed using GC-FID and GC-MS showed that the main component was methyl chavicol (87.4−90.6%) with the highest values found in the oils of basil under lighting conditions of 6 h/day and 150−200 µmol·m−2·s−1. Additional lighting conditions caused the significant differences (p < 0.001) in basil biomass and oil production with the highest values found in the oils of basil under two conditions of (1) 71% Red: 20% Blue: 9.0% UVA in at 120 μmol·m−2·s−1 in 6 h/day and (2) 43.5% Red: 43.5% Blue: 8.0% Green: 5.0% Far-Red at 100 μmol·m−2·s−1 in 6 h/day. The oils of basil in some formulas showed weak inhibitory effects on only the Bacillus subtilis strain. Different light spectra affect the biomass and essential oil production of basil, as well as the concentrations of the major components in the oil.
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Affiliation(s)
- Ha Thi Thu Chu
- Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Ha Noi 10072, Vietnam
- Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Ha Noi 10072, Vietnam
- Correspondence: (H.T.T.C.); (T.N.V.)
| | - Thi Nghiem Vu
- Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Ha Noi 10072, Vietnam
- Institute of Materials Science, VAST, 18 Hoang Quoc Viet, Ha Noi 10072, Vietnam
- Correspondence: (H.T.T.C.); (T.N.V.)
| | - Thuy Thi Thu Dinh
- Institute of Natural Product Chemistry, VAST, 18 Hoang Quoc Viet, Ha Noi 10072, Vietnam
| | - Phat Tien Do
- Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Ha Noi 10072, Vietnam
- Institute of Biotechnology, VAST, 18 Hoang Quoc Viet, Ha Noi 10072, Vietnam
| | - Ha Hoang Chu
- Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Ha Noi 10072, Vietnam
- Institute of Biotechnology, VAST, 18 Hoang Quoc Viet, Ha Noi 10072, Vietnam
| | - Tran Quoc Tien
- Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Ha Noi 10072, Vietnam
- Institute of Materials Science, VAST, 18 Hoang Quoc Viet, Ha Noi 10072, Vietnam
| | - Quang Cong Tong
- Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Ha Noi 10072, Vietnam
- Institute of Materials Science, VAST, 18 Hoang Quoc Viet, Ha Noi 10072, Vietnam
| | - Manh Hieu Nguyen
- Institute of Materials Science, VAST, 18 Hoang Quoc Viet, Ha Noi 10072, Vietnam
| | - Quyen Thi Ha
- Faculty of Agricultural Technology, VNU University of Engineering and Technology, Vietnam National University Hanoi, 144 Xuan Thuy, Ha Noi 10053, Vietnam
| | - William N. Setzer
- Aromatic Plant Research Center, 230 N 1200 E, Suite 100, Lehi, UT 84043, USA
- Department of Chemistry, University of Alabama in Huntsville, Huntsville, AL 35899, USA
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11
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Morgan BL, Donohue K. Parental
DNA
methylation influences plasticity of early offspring traits, but offspring
DNA
methylation influences trait plasticity throughout life. Ecol Evol 2022. [DOI: 10.1002/ece3.9224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Britany L. Morgan
- University Program in Ecology Duke University Durham North Carolina USA
- Center for Agricultural Synthetic Biology University of Tennessee Knoxville Tennessee USA
| | - Kathleen Donohue
- University Program in Ecology Duke University Durham North Carolina USA
- Biology Department Duke University Durham North Carolina USA
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12
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Rhodes BM, Siddiqui H, Khan S, Devlin PF. Dual Role for FHY3 in Light Input to the Clock. FRONTIERS IN PLANT SCIENCE 2022; 13:862387. [PMID: 35755710 PMCID: PMC9218818 DOI: 10.3389/fpls.2022.862387] [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: 01/25/2022] [Accepted: 05/16/2022] [Indexed: 06/15/2023]
Abstract
The red-light regulated transcription factors FHY3 and FAR1 form a key point of light input to the plant circadian clock in positively regulating expression of genes within the central clock. However, the fhy3 mutant shows an additional red light-specific disruption of rhythmicity which is inconsistent with this role. Here we demonstrate that only fhy3 and not far1 mutants show this red specific disruption of rhythmicity. We examined the differences in rhythmic transcriptome in red versus white light and reveal differences in patterns of rhythmicity among the central clock proteins suggestive of a change in emphasis within the central mechanism of the clock, changes which underlie the red specificity of the fhy3 mutant. In particular, changes in enrichment of promoter elements were consistent with a key role for the HY5 transcription factor, a known integrator of the ratio of red to blue light in regulation of the clock. Examination of differences in the rhythmic transcriptome in the fhy3 mutant in red light identified specific disruption of the CCA1-regulated ELF3 and LUX central clock genes, while the CCA1 target TBS element, TGGGCC, was enriched among genes that became arrhythmic. Coupled with the known interaction of FHY3 but not FAR1 with CCA1 we propose that the red-specific circadian phenotype of fhy3 may involve disruption of the previously demonstrated moderation of CCA1 activity by FHY3 rather than a disruption of its own transcriptional regulatory activity. Together, this evidence suggests a conditional redundancy between FHY3 and HY5 in the integration of red and blue light input to the clock in order to enable a plasticity in response to light and optimise plant adaptation. Furthermore, our evidence also suggests changes in CCA1 activity between red and white light transcriptomes. This, together with the documented interaction of HY5 with CCA1, leads us to propose a model whereby this integration of red and blue signals may at least partly occur via direct FHY3 and HY5 interaction with CCA1 leading to moderation of CCA1 activity.
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Affiliation(s)
| | | | | | - Paul F. Devlin
- Department of Biological Sciences, Royal Holloway, University of London, Egham, United Kingdom
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13
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Yavari N, Gazestani VH, Wu BS, MacPherson S, Kushalappa A, Lefsrud MG. Comparative proteomics analysis of Arabidopsis thaliana response to light-emitting diode of narrow wavelength 450 nm, 595 nm, and 650 nm. J Proteomics 2022; 265:104635. [PMID: 35659537 DOI: 10.1016/j.jprot.2022.104635] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 05/23/2022] [Accepted: 05/28/2022] [Indexed: 11/16/2022]
Abstract
Incident light is a central modulator of plant growth and development. However, there are still open questions surrounding wavelength-specific plant proteomic responses. Here we applied tandem mass tag based quantitative proteomics technology to acquire an in-depth view of proteome changes in Arabidopsis thaliana response to narrow wavelength blue (B; 450 nm), amber (A; 595 nm), or red (R; 650 nm) light treatments. A total of 16,707 proteins were identified with 9120 proteins quantified across all three light treatments in three biological replicates. This enabled examination of changes in the abundance for proteins with low abundance and important regulatory roles including transcription factors and hormone signaling. Importantly, 18% (1631 proteins) of the A. thaliana proteome is differentially abundant in response to narrow wavelength lights, and changes in proteome correlate well with different morphologies exhibited by plants. To showcase the usefulness of this resource, data were placed in the context of more than thirty published datasets, providing orthogonal validation and further insights into light-specific biological pathways, including Systemic Acquired Resistance and Shade Avoidance Syndrome. This high-resolution resource for A. thaliana provides baseline data and a tool for defining molecular mechanisms that control fundamental aspects of plant response to changing light conditions, with implications in plant development and adaptation. SIGNIFICANCE: Understanding of molecular mechanisms involved in wavelength-specific response of plant is question of widespread interest both to basic researchers and to those interested in applying such knowledge to the engineering of novel proteins, as well as targeted lighting systems. Here we sought to generate a high-resolution labeling proteomic profile of plant leaves, based on exposure to specific narrow-wavelength lights. Although changes in plant physiology in response to light spectral composition is well documented, there is limited knowledge on the roles of specific light wavelengths and their impact. Most previous studies have utilized relatively broad wavebands in their experiments. These multi-wavelengths lights function in a complex signaling network, which provide major challenges in inference of wavelength-specific molecular processes that underly the plant response. Besides, most studies have compared the effect of blue and red wavelengths comparing with FL, as control. As FL light consists the mixed spectra composition of both red and blue as well as numerous other wavelengths, comparing undeniably results in inconsistent and overlapping responses that will hamper effects to elucidate the plant response to specific wavelengths [1, 2]. Monitoring plant proteome response to specific wavelengths and further compare the changes to one another, rather than comparing plants proteome to FL, is thus necessary to gain the clear insights to specific underlying biological pathways and their effect consequences in plant response. Here, we employed narrow wavelength LED lights in our design to eliminate the potential overlap in molecular responses by ensuring non-overlapping wavelengths in the light treatments. We further applied TMT-labeling technology to gain a high-resolution view on the associates of proteome changes. Our proteomics data provides an in-depth coverage suitable for system-wide analyses, providing deep insights on plant physiological processes particularly because of the tremendous increase in the amount of identified proteins which outreach the other biological data.
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Affiliation(s)
- Nafiseh Yavari
- Department of Bioresource Engineering, McGill University, Macdonald Campus, 21,111 Lakeshore Road, Ste-Anne-De-Bellevue, Quebec, Canada; Department of Electro-Chemistry Engineering, Dexcom, Inc., 6340 Sequence Dr., San Diego, CA, USA.
| | - Vahid H Gazestani
- Broad Institute of Harvard and MIT, Stanley Center for Psychiatric Research, 75 Ames Street, Cambridge, MA, USA
| | - Bo-Sen Wu
- Department of Bioresource Engineering, McGill University, Macdonald Campus, 21,111 Lakeshore Road, Ste-Anne-De-Bellevue, Quebec, Canada
| | - Sarah MacPherson
- Department of Bioresource Engineering, McGill University, Macdonald Campus, 21,111 Lakeshore Road, Ste-Anne-De-Bellevue, Quebec, Canada
| | - Ajjamada Kushalappa
- Department of Plant Science, McGill University, Macdonald Campus, 21,111 Lakeshore Road, Ste-Anne-De-Bellevue, Quebec, Canada
| | - Mark G Lefsrud
- Department of Bioresource Engineering, McGill University, Macdonald Campus, 21,111 Lakeshore Road, Ste-Anne-De-Bellevue, Quebec, Canada
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14
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Wang H, Seiler C, Sreenivasulu N, von Wirén N, Kuhlmann M. INTERMEDIUM-C mediates the shade-induced bud growth arrest in barley. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:1963-1977. [PMID: 34894212 PMCID: PMC8982414 DOI: 10.1093/jxb/erab542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 12/09/2021] [Indexed: 06/14/2023]
Abstract
Tiller formation is a key agronomic determinant for grain yield in cereal crops. The modulation of this trait is controlled by transcriptional regulators and plant hormones, tightly regulated by external environmental conditions. While endogenous (genetic) and exogenous (environmental factors) triggers for tiller formation have mostly been investigated separately, it has remained elusive how they are integrated into the developmental program of this trait. The transcription factor gene INTERMEDIUM-C (INT-C), which is the barley ortholog of the maize domestication gene TEOSINTE BRANCHED1 (TB1), has a prominent role in regulating tiller bud outgrowth. Here we show that INT-C is expressed in tiller buds, required for bud growth arrest in response to shade. In contrast to wild-type plants, int-c mutant plants are impaired in their shade response and do not stop tiller production after shading. Gene expression levels of INT-C are up-regulated under light-limiting growth conditions, and down-regulated after decapitation. Transcriptome analysis of wild-type and int-c buds under control and shading conditions identified target genes of INT-C that belong to auxin and gibberellin biosynthesis and signaling pathways. Our study identifies INT-C as an integrator of the shade response into tiller formation, which is prerequisite for implementing shading responses in the breeding of cereal crops.
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Affiliation(s)
- Hongwen Wang
- Department of Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)Gatersleben, Corrensstrasse 3, D-06466 Stadt Seeland, Germany
| | - Christiane Seiler
- Department of Molecular Genetics, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)Gatersleben, Corrensstrasse 3, D-06466 Stadt Seeland, Germany
| | - Nese Sreenivasulu
- International Rice Research Institute (IRRI), Grain Quality and Nutrition Center, Metro Manila, Philippines
| | - Nicolaus von Wirén
- Department of Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)Gatersleben, Corrensstrasse 3, D-06466 Stadt Seeland, Germany
| | - Markus Kuhlmann
- Department of Molecular Genetics, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)Gatersleben, Corrensstrasse 3, D-06466 Stadt Seeland, Germany
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15
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Phenotypic Plasticity of Cunninghamialanceolata (Lamb.) Hook. Seedlings in Response to Varied Light Quality Treatments. FORESTS 2022. [DOI: 10.3390/f13020201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Effects of light quality on phenotypic plasticity in Cunninghamialanceolata (Lamb.) Hook. seedlings during growth and development, and the underlying mechanisms, were investigated. The seedlings showed distinct morphological adjustments when exposed to an equal photosynthetic photon flux density (400 μmol·m−2·s−1) of different light qualities: monochromatic blue (BL), monochromatic red (RL), monochromatic far-red (FrL), mixed RL and FrL at 1:1 (RFr1:1L), mixed RL and FrL at 1:2 (RFr1:2L), and multi-wavelength white (WL, control). Compared with WL, FrL and BL significantly promoted height increment. However, BL was unfavorable for root growth. The seedling biomass was lower and the root-to-shoot ratio was smaller under BL. RL promoted leaf area enlargement, root growth, axillary bud number, and increased the root-to-shoot ratio, but inhibited stem elongation. Low R/Fr ratios or increased FrL proportion increased seedling stem elongation. The seedling growth under RFr1:1L treatment was poorer than that under other treatments; however, the number of axillary buds was the highest. The plasticity of leaf morphology traits was lower in different treatments, and that of axillary bud traits was crucial in the adaptation of C. lanceolata to light quality. Precise management of light quality and wavelength in controlled environments may maximize the economic efficiency of forest production and enhance its quality.
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16
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Xu H, Chen P, Tao Y. Understanding the Shade Tolerance Responses Through Hints From Phytochrome A-Mediated Negative Feedback Regulation in Shade Avoiding Plants. FRONTIERS IN PLANT SCIENCE 2021; 12:813092. [PMID: 35003197 PMCID: PMC8727698 DOI: 10.3389/fpls.2021.813092] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 12/03/2021] [Indexed: 06/14/2023]
Abstract
Based on how plants respond to shade, we typically classify them into two groups: shade avoiding and shade tolerance plants. Under vegetative shade, the shade avoiding species induce a series of shade avoidance responses (SARs) to outgrow their competitors, while the shade tolerance species induce shade tolerance responses (STRs) to increase their survival rates under dense canopy. The molecular mechanism underlying the SARs has been extensively studied using the shade avoiding model plant Arabidopsis thaliana, while little is known about STRs. In Aarabidopsis, there is a PHYA-mediated negative feedback regulation that suppresses exaggerated SARs. Recent studies revealed that in shade tolerance Cardamine hirsuta plants, a hyperactive PHYA was responsible for suppressing shade-induced elongation growth. We propose that similar signaling components may be used by shade avoiding and shade tolerance plants, and different phenotypic outputs may result from differential regulation or altered dynamic properties of these signaling components. In this review, we summarized the role of PHYA and its downstream components in shade responses, which may provide insights into understanding how both types of plants respond to shade.
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Affiliation(s)
| | | | - Yi Tao
- Key Laboratory of Xiamen Plant Genetics and State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China
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17
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Yu ZC, Lin W, Zheng XT, Cai ML, Zhang TJ, Luo YN, Peng CL. Interpretation of the difference in shade tolerance of two subtropical forest tree species of different successional stages at the transcriptome and physiological levels. TREE PHYSIOLOGY 2021; 41:1669-1684. [PMID: 33611548 DOI: 10.1093/treephys/tpab030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 02/12/2021] [Indexed: 06/12/2023]
Abstract
Differences in plant shade tolerance constitute a major mechanism driving the succession of forest communities in subtropical forests. However, the indirect effects of differences in light requirements on the growth of mid- and late-successional tree species are unclear, and this potential growth effect has not been explained at the transcriptome level. Here, a typical mid-successional dominant tree species, Schima superba Gardn. et Champ, and a typical late-successional dominant tree species, Cryptocarya concinna Hance were used as materials and planted under 100% full light (FL) and 30% FL (low light, LL) to explore the responses of tree species in different successional stages of subtropical forests to different light environments. Transcriptome sequencing was used to analyze the expression changes in genes related to growth and photoprotection under different light environments. The young leaves of S. superba accumulated more malondialdehyde (MDA) and superoxide radicals (${\mathrm{O}}_2^{{{}^{\bullet}}^{-}}$) under LL. A lower hormone content (auxin, cytokinin, gibberellin) in the young leaves, a weaker photosynthetic capacity in the mature leaves and significant downregulation of related gene expression were also found under LL, which resulted in the total biomass of S. superba under LL being lower than that under FL. The young leaves of C. concinna had less MDA and ${\mathrm{O}}_2^{{{}^{\bullet}}^{-}}$, and a higher hormone contents under LL than those under FL. There was no significant difference in photosynthetic capacity between mature leaves in contrasting light environments. Although the biomass of C. concinna under LL was less than that under FL, the height of C. concinna under LL was higher than that under FL, indicating that C. concinna could grow well under the two light environments. Our results describing the acclimatization of light at the physiological, molecular and transcriptome levels are important for a complete understanding of successional mechanisms.
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Affiliation(s)
- Zheng-Chao Yu
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, School of Life Sciences, South China Normal University, Guangzhou 510631, PR China
| | - Wei Lin
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, School of Life Sciences, South China Normal University, Guangzhou 510631, PR China
| | - Xiao-Ting Zheng
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, School of Life Sciences, South China Normal University, Guangzhou 510631, PR China
| | - Min-Ling Cai
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, School of Life Sciences, South China Normal University, Guangzhou 510631, PR China
| | - Tai-Jie Zhang
- Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, PR China
| | - Yan-Na Luo
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, School of Life Sciences, South China Normal University, Guangzhou 510631, PR China
| | - Chang-Lian Peng
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, School of Life Sciences, South China Normal University, Guangzhou 510631, PR China
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18
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Hernando CE, Murcia MG, Pereyra ME, Sellaro R, Casal JJ. Phytochrome B links the environment to transcription. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:4068-4084. [PMID: 33704448 DOI: 10.1093/jxb/erab037] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 02/08/2021] [Indexed: 06/12/2023]
Abstract
Phytochrome B (phyB) senses the difference between darkness and light, the level of irradiance, the red/far-red ratio, and temperature. Thanks to these sensory capacities, phyB perceives whether plant organs are buried in the soil, exposed to full sunlight, in the presence of nearby vegetation, and/or under risk of heat stress. In some species, phyB perceives seasonal daylength cues. phyB affects the activity of several transcriptional regulators either by direct physical interaction or indirectly by physical interaction with proteins involved in the turnover of transcriptional regulators. Typically, interaction of a protein with phyB has either negative or positive effects on the interaction of the latter with a third party, this being another protein or DNA. Thus, phyB mediates the context-dependent modulation of the transcriptome underlying changes in plant morphology, physiology, and susceptibility to biotic and abiotic stress. phyB operates as a dynamic switch that improves carbon balance, prioritizing light interception and photosynthetic capacity in open places and the projection of the shoot towards light in the soil, under shade and in warm conditions.
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Affiliation(s)
- Carlos Esteban Hernando
- Fundación Instituto Leloir and IIBBA-CONICET, Av. Patricias Argentinas 435, Buenos Aires C1405BWE, Argentina
| | - Mauro Germán Murcia
- Fundación Instituto Leloir and IIBBA-CONICET, Av. Patricias Argentinas 435, Buenos Aires C1405BWE, Argentina
| | - Matías Ezequiel Pereyra
- Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA), Facultad de Agronomía, Av. San Martín 4453, Buenos Aires C1417DSE, Argentina
| | - Romina Sellaro
- Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA), Facultad de Agronomía, Av. San Martín 4453, Buenos Aires C1417DSE, Argentina
| | - Jorge José Casal
- Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA), Facultad de Agronomía, Av. San Martín 4453, Buenos Aires C1417DSE, Argentina
- Fundación Instituto Leloir and IIBBA-CONICET, Av. Patricias Argentinas 435, Buenos Aires C1405BWE, Argentina
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19
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Thomas S, Kumar R, Sharma K, Barpanda A, Sreelakshmi Y, Sharma R, Srivastava S. iTRAQ-based proteome profiling revealed the role of Phytochrome A in regulating primary metabolism in tomato seedling. Sci Rep 2021; 11:7540. [PMID: 33824368 PMCID: PMC8024257 DOI: 10.1038/s41598-021-87208-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 03/22/2021] [Indexed: 12/30/2022] Open
Abstract
In plants, during growth and development, photoreceptors monitor fluctuations in their environment and adjust their metabolism as a strategy of surveillance. Phytochromes (Phys) play an essential role in plant growth and development, from germination to fruit development. FR-light (FR) insensitive mutant (fri) carries a recessive mutation in Phytochrome A and is characterized by the failure to de-etiolate in continuous FR. Here we used iTRAQ-based quantitative proteomics along with metabolomics to unravel the role of Phytochrome A in regulating central metabolism in tomato seedlings grown under FR. Our results indicate that Phytochrome A has a predominant role in FR-mediated establishment of the mature seedling proteome. Further, we observed temporal regulation in the expression of several of the late response proteins associated with central metabolism. The proteomics investigations identified a decreased abundance of enzymes involved in photosynthesis and carbon fixation in the mutant. Profound accumulation of storage proteins in the mutant ascertained the possible conversion of sugars into storage material instead of being used or the retention of an earlier profile associated with the mature embryo. The enhanced accumulation of organic sugars in the seedlings indicates the absence of photomorphogenesis in the mutant.
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Affiliation(s)
- Sherinmol Thomas
- Proteomics Lab, Department of Biosciences and Bioengineering, IIT Bombay, Mumbai, Maharashtra, 400076, India
| | - Rakesh Kumar
- Repository of Tomato Genomics Resources, Department of Plant Sciences, University of Hyderabad, Hyderabad, 500046, India
- Deptartment of Life Science, Central University of Karnataka, Kadaganchi, Kalaburagi, Karnataka, 585367, India
| | - Kapil Sharma
- Repository of Tomato Genomics Resources, Department of Plant Sciences, University of Hyderabad, Hyderabad, 500046, India
| | - Abhilash Barpanda
- Proteomics Lab, Department of Biosciences and Bioengineering, IIT Bombay, Mumbai, Maharashtra, 400076, India
| | - Yellamaraju Sreelakshmi
- Repository of Tomato Genomics Resources, Department of Plant Sciences, University of Hyderabad, Hyderabad, 500046, India
| | - Rameshwar Sharma
- Repository of Tomato Genomics Resources, Department of Plant Sciences, University of Hyderabad, Hyderabad, 500046, India
| | - Sanjeeva Srivastava
- Proteomics Lab, Department of Biosciences and Bioengineering, IIT Bombay, Mumbai, Maharashtra, 400076, India.
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20
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Huber M, Nieuwendijk NM, Pantazopoulou CK, Pierik R. Light signalling shapes plant-plant interactions in dense canopies. PLANT, CELL & ENVIRONMENT 2021; 44:1014-1029. [PMID: 33047350 PMCID: PMC8049026 DOI: 10.1111/pce.13912] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 10/06/2020] [Accepted: 10/07/2020] [Indexed: 05/09/2023]
Abstract
Plants growing at high densities interact via a multitude of pathways. Here, we provide an overview of mechanisms and functional consequences of plant architectural responses initiated by light cues that occur in dense vegetation. We will review the current state of knowledge about shade avoidance, as well as its possible applications. On an individual level, plants perceive neighbour-associated changes in light quality and quantity mainly with phytochromes for red and far-red light and cryptochromes and phototropins for blue light. Downstream of these photoreceptors, elaborate signalling and integration takes place with the PHYTOCHROME INTERACTING FACTORS, several hormones and other regulators. This signalling leads to the shade avoidance responses, consisting of hyponasty, stem and petiole elongation, apical dominance and life cycle adjustments. Architectural changes of the individual plant have consequences for the plant community, affecting canopy structure, species composition and population fitness. In this context, we highlight the ecological, evolutionary and agricultural importance of shade avoidance.
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Affiliation(s)
- Martina Huber
- Plant Ecophysiology, Dept. BiologyUtrecht UniversityUtrechtThe Netherlands
| | | | | | - Ronald Pierik
- Plant Ecophysiology, Dept. BiologyUtrecht UniversityUtrechtThe Netherlands
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21
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Li QQ, Zhang Z, Wang YL, Zhong LY, Chao ZF, Gao YQ, Han ML, Xu L, Chao DY. Phytochrome B inhibits darkness-induced hypocotyl adventitious root formation by stabilizing IAA14 and suppressing ARF7 and ARF19. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 105:1689-1702. [PMID: 33354819 DOI: 10.1111/tpj.15142] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 12/10/2020] [Accepted: 12/17/2020] [Indexed: 06/12/2023]
Abstract
Adventitious roots (ARs) are an important root type for plants and display a high phenotypic plasticity in response to different environmental stimuli. Previous studies found that dark-light transition can trigger AR formation from the hypocotyl of etiolated Arabidopsis thaliana, which was used as a model for the identification of regulators of AR biogenesis. However, the central regulatory machinery for darkness-induced hypocotyl AR (HAR) remains elusive. Here, we report that photoreceptors suppress HAR biogenesis through regulating the molecular module essential for lateral roots. We found that hypocotyls embedded in soil or in continuous darkness are able to develop HARs, wherein photoreceptors act as negative regulators. Distinct from wound-induced ARs that require WOX11 and WOX12, darkness-induced HARs are fully dependent on ARF7, ARF19, WOX5/7, and LBD16. Further studies established that PHYB interacts with IAA14, ARF7, and ARF9. The interactions stabilize IAA14 and inhibit the transcriptional activities of ARF7 and ARF19 and thus suppress biogenesis of darkness-induced HARs. This finding not only revealed the central machinery controlling HAR biogenesis but also illustrated that AR formation could be initiated by multiple pathways.
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Affiliation(s)
- Qian-Qian Li
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhan Zhang
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Ya-Ling Wang
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Li-Yuan Zhong
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhen-Fei Chao
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yi-Qun Gao
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Mei-Ling Han
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Lin Xu
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Dai-Yin Chao
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
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22
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Favero DS, Lambolez A, Sugimoto K. Molecular pathways regulating elongation of aerial plant organs: a focus on light, the circadian clock, and temperature. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 105:392-420. [PMID: 32986276 DOI: 10.1111/tpj.14996] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/11/2020] [Accepted: 09/15/2020] [Indexed: 06/11/2023]
Abstract
Organs such as hypocotyls and petioles rapidly elongate in response to shade and temperature cues, contributing to adaptive responses that improve plant fitness. Growth plasticity in these organs is achieved through a complex network of molecular signals. Besides conveying information from the environment, this signaling network also transduces internal signals, such as those associated with the circadian clock. A number of studies performed in Arabidopsis hypocotyls, and to a lesser degree in petioles, have been informative for understanding the signaling networks that regulate elongation of aerial plant organs. In particular, substantial progress has been made towards understanding the molecular mechanisms that regulate responses to light, the circadian clock, and temperature. Signals derived from these three stimuli converge on the BAP module, a set of three different types of transcription factors that interdependently promote gene transcription and growth. Additional key positive regulators of growth that are also affected by environmental cues include the CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1) and SUPPRESSOR OF PHYA-105 (SPA) E3 ubiquitin ligase proteins. In this review we summarize the key signaling pathways that regulate the growth of hypocotyls and petioles, focusing specifically on molecular mechanisms important for transducing signals derived from light, the circadian clock, and temperature. While it is clear that similarities abound between the signaling networks at play in these two organs, there are also important differences between the mechanisms regulating growth in hypocotyls and petioles.
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Affiliation(s)
- David S Favero
- RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa, 230-0045, Japan
| | - Alice Lambolez
- RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa, 230-0045, Japan
- Department of Biological Sciences, The University of Tokyo, Tokyo, 119-0033, Japan
| | - Keiko Sugimoto
- RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa, 230-0045, Japan
- Department of Biological Sciences, The University of Tokyo, Tokyo, 119-0033, Japan
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23
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Song B, Zhao H, Dong K, Wang M, Wu S, Li S, Wang Y, Chen P, Jiang L, Tao Y. Phytochrome A inhibits shade avoidance responses under strong shade through repressing the brassinosteroid pathway in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 104:1520-1534. [PMID: 33037720 DOI: 10.1111/tpj.15018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 08/10/2020] [Indexed: 06/11/2023]
Abstract
In dense canopy, a reduction in red to far-red (R/FR) light ratio triggers shade avoidance responses (SARs) in Arabidopsis thaliana, a shade avoiding plant. Two red/far-red (R/FR) light photoreceptors, PHYB and PHYA, were reported to be key negative regulators of the SARs. PHYB represses the SARs under normal light conditions; however, the role of PHYA in the SARs remains elusive. We set up two shade conditions: Shade and strong Shade (s-Shade) with different R/FR ratios (0.7 and 0.1), which allowed us to observe phenotypes dominated by PHYB- and PHYA-mediated pathway, respectively. By comparing the hypocotyl growth under these two conditions with time, we found PHYA was predominantly activated in the s-Shade after prolonged shade treatment. We further showed that under s-Shade, PHYA inhibits hypocotyl elongation partially through repressing the brassinosteroid (BR) pathway. COP1 and PIF4,5 act downstream of PHYA. After prolonged shade treatment, the nuclear localization of COP1 was reduced, while the PIF4 protein level was much lower in the s-Shade than that in Shade. Both changes occurred in a PHYA-dependent manner. We propose that under deep canopy, the R/FR ratio is extremely low, which promotes the nuclear accumulation of PHYA. Activated PHYA reduces COP1 nuclear speckle, which may lead to changes of downstream targets, such as PIF4,5 and HY5. Together, these proteins regulate the BR pathway through modulating BES1/BZR1 and the expression of BR biosynthesis and BR target genes.
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Affiliation(s)
- Bin Song
- Xiamen Plant Genetics Key Laboratory and State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian Province, 361102, China
| | - Hongli Zhao
- Xiamen Plant Genetics Key Laboratory and State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian Province, 361102, China
| | - Kangmei Dong
- Xiamen Plant Genetics Key Laboratory and State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian Province, 361102, China
| | - Meiling Wang
- Xiamen Plant Genetics Key Laboratory and State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian Province, 361102, China
| | - Shujuan Wu
- Xiamen Plant Genetics Key Laboratory and State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian Province, 361102, China
| | - Si Li
- Xiamen Plant Genetics Key Laboratory and State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian Province, 361102, China
| | - Yuxiang Wang
- Xiamen Plant Genetics Key Laboratory and State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian Province, 361102, China
| | - Peirui Chen
- Xiamen Plant Genetics Key Laboratory and State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian Province, 361102, China
| | - Liangrong Jiang
- Xiamen Plant Genetics Key Laboratory and State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian Province, 361102, China
| | - Yi Tao
- Xiamen Plant Genetics Key Laboratory and State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian Province, 361102, China
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24
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Lew TTS, Sarojam R, Jang IC, Park BS, Naqvi NI, Wong MH, Singh GP, Ram RJ, Shoseyov O, Saito K, Chua NH, Strano MS. Species-independent analytical tools for next-generation agriculture. NATURE PLANTS 2020; 6:1408-1417. [PMID: 33257857 DOI: 10.1038/s41477-020-00808-7] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 10/16/2020] [Indexed: 05/26/2023]
Abstract
Innovative approaches are urgently required to alleviate the growing pressure on agriculture to meet the rising demand for food. A key challenge for plant biology is to bridge the notable knowledge gap between our detailed understanding of model plants grown under laboratory conditions and the agriculturally important crops cultivated in fields or production facilities. This Perspective highlights the recent development of new analytical tools that are rapid and non-destructive and provide tissue-, cell- or organelle-specific information on living plants in real time, with the potential to extend across multiple species in field applications. We evaluate the utility of engineered plant nanosensors and portable Raman spectroscopy to detect biotic and abiotic stresses, monitor plant hormonal signalling as well as characterize the soil, phytobiome and crop health in a non- or minimally invasive manner. We propose leveraging these tools to bridge the aforementioned fundamental gap with new synthesis and integration of expertise from plant biology, engineering and data science. Lastly, we assess the economic potential and discuss implementation strategies that will ensure the acceptance and successful integration of these modern tools in future farming practices in traditional as well as urban agriculture.
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Affiliation(s)
| | - Rajani Sarojam
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, Singapore
- Disruptive & Sustainable Technologies for Agricultural Precision, Singapore-MIT Alliance for Research and Technology, Singapore, Singapore
| | - In-Cheol Jang
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, Singapore
- Disruptive & Sustainable Technologies for Agricultural Precision, Singapore-MIT Alliance for Research and Technology, Singapore, Singapore
| | - Bong Soo Park
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, Singapore
- Disruptive & Sustainable Technologies for Agricultural Precision, Singapore-MIT Alliance for Research and Technology, Singapore, Singapore
| | - Naweed I Naqvi
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, Singapore
| | - Min Hao Wong
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Gajendra P Singh
- Disruptive & Sustainable Technologies for Agricultural Precision, Singapore-MIT Alliance for Research and Technology, Singapore, Singapore
| | - Rajeev J Ram
- Disruptive & Sustainable Technologies for Agricultural Precision, Singapore-MIT Alliance for Research and Technology, Singapore, Singapore
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Oded Shoseyov
- The Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Kazuki Saito
- Metabolomics Research Group, RIKEN Center for Sustainable Resource Science, Yokohama, Japan
| | - Nam-Hai Chua
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, Singapore.
- Disruptive & Sustainable Technologies for Agricultural Precision, Singapore-MIT Alliance for Research and Technology, Singapore, Singapore.
| | - Michael S Strano
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Disruptive & Sustainable Technologies for Agricultural Precision, Singapore-MIT Alliance for Research and Technology, Singapore, Singapore.
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25
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Jenness MK, Tayengwa R, Murphy AS. An ATP-Binding Cassette Transporter, ABCB19, Regulates Leaf Position and Morphology during Phototropin1-Mediated Blue Light Responses. PLANT PHYSIOLOGY 2020; 184:1601-1612. [PMID: 32855213 PMCID: PMC7608178 DOI: 10.1104/pp.20.00223] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 08/18/2020] [Indexed: 05/25/2023]
Abstract
Blue light regulates multiple processes that optimize light capture and gas exchange in plants, including chloroplast movement, changes in stomatal conductance, and altered organ positioning. In Arabidopsis (Arabidopsis thaliana), these processes are primarily modulated by the blue light phototropin photoreceptors phot1 and phot2. Changes in leaf positioning and shape involve several signaling components that include NON-PHOTOTROPIC HYPOCOTYL3, PHYTOCHROME KINASE SUBSTRATE, ROOT PHOTOTROPISM2, and alterations in localized auxin streams. Direct phosphorylation of the auxin transporter ATP-BINDING CASSETTE subfamily B19 (ABCB19) by phot1 in phototropic seedlings suggests that phot1 may directly regulate ABCB19 to adjust auxin-dependent leaf responses. Here, abcb19 mutants were analyzed for fluence and blue light-dependent changes in leaf positioning and morphology. abcb19 displays upright petiole angles that remain unchanged in response to red and blue light. Similarly, abcb19 mutants develop irregularly wavy rosette leaves that are less sensitive to blue light-mediated leaf flattening. Visualization of auxin distribution, measurement of auxin transport in protoplasts, and direct quantification of free auxin levels suggest these irregularities are caused by misregulation of ABCB19-mediated auxin distribution in addition to light-dependent auxin biosynthesis.
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Affiliation(s)
- Mark K Jenness
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, Maryland 20740
| | - Reuben Tayengwa
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, Maryland 20740
| | - Angus S Murphy
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, Maryland 20740
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26
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Sng BJR, Singh GP, Van Vu K, Chua NH, Ram RJ, Jang IC. Rapid metabolite response in leaf blade and petiole as a marker for shade avoidance syndrome. PLANT METHODS 2020; 16:144. [PMID: 33117429 PMCID: PMC7590806 DOI: 10.1186/s13007-020-00688-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 10/17/2020] [Indexed: 05/10/2023]
Abstract
BACKGROUND Shade avoidance syndrome (SAS) commonly occurs in plants experiencing vegetative shade, causing morphological and physiological changes that are detrimental to plant health and consequently crop yield. As the effects of SAS on plants are irreversible, early detection of SAS in plants is critical for sustainable agriculture. However, conventional methods to assess SAS are restricted to observing for morphological changes and checking the expression of shade-induced genes after homogenization of plant tissues, which makes it difficult to detect SAS early. RESULTS Using the model plant Arabidopsis thaliana, we introduced the use of Raman spectroscopy to measure shade-induced changes of metabolites in vivo. Raman spectroscopy detected a decrease in carotenoid contents in leaf blades and petioles of plants with SAS, which were induced by low Red:Far-red light ratio or high density conditions. Moreover, by measuring the carotenoid Raman peaks, we were able to show that the reduction in carotenoid content under shade was mediated by phytochrome signaling. Carotenoid Raman peaks showed more remarkable response to SAS in petioles than leaf blades of plants, which greatly corresponded to their morphological response under shade or high plant density. Most importantly, carotenoid content decreased shortly after shade induction but before the occurrence of visible morphological changes. We demonstrated this finding to be similar in other plant species. Comprehensive testing of Brassica vegetables showed that carotenoid content decreased during SAS, in both shade and high density conditions. Likewise, carotenoid content responded quickly to shade, in a manner similar to Arabidopsis plants. CONCLUSIONS In various plant species tested in this study, quantification of carotenoid Raman peaks correlate to the severity of SAS. Moreover, short-term exposure to shade can induce the carotenoid Raman peaks to decrease. These findings highlight the carotenoid Raman peaks as a biomarker for early diagnosis of SAS in plants.
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Affiliation(s)
- Benny Jian Rong Sng
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, 117604 Singapore
- Department of Biological Sciences, National University of Singapore, Singapore, 117543 Singapore
- Disruptive & Sustainable Technologies for Agricultural Precision, 1 CREATE way, Singapore-MIT Alliance for Research and Technology, Singapore, 138602 Singapore
| | - Gajendra Pratap Singh
- Disruptive & Sustainable Technologies for Agricultural Precision, 1 CREATE way, Singapore-MIT Alliance for Research and Technology, Singapore, 138602 Singapore
| | - Kien Van Vu
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, 117604 Singapore
- Disruptive & Sustainable Technologies for Agricultural Precision, 1 CREATE way, Singapore-MIT Alliance for Research and Technology, Singapore, 138602 Singapore
| | - Nam-Hai Chua
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, 117604 Singapore
- Disruptive & Sustainable Technologies for Agricultural Precision, 1 CREATE way, Singapore-MIT Alliance for Research and Technology, Singapore, 138602 Singapore
| | - Rajeev J. Ram
- Disruptive & Sustainable Technologies for Agricultural Precision, 1 CREATE way, Singapore-MIT Alliance for Research and Technology, Singapore, 138602 Singapore
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139 USA
| | - In-Cheol Jang
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, 117604 Singapore
- Department of Biological Sciences, National University of Singapore, Singapore, 117543 Singapore
- Disruptive & Sustainable Technologies for Agricultural Precision, 1 CREATE way, Singapore-MIT Alliance for Research and Technology, Singapore, 138602 Singapore
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27
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Martínez-Fernández I, Menezes de Moura S, Alves-Ferreira M, Ferrándiz C, Balanzà V. Identification of Players Controlling Meristem Arrest Downstream of the FRUITFULL-APETALA2 Pathway. PLANT PHYSIOLOGY 2020; 184:945-959. [PMID: 32778534 PMCID: PMC7536680 DOI: 10.1104/pp.20.00800] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 07/28/2020] [Indexed: 05/09/2023]
Abstract
The end of the reproductive phase in monocarpic plants is determined by a coordinated arrest of all active meristems, a process known as global proliferative arrest (GPA). GPA is linked to the correlative control exerted by developing seeds and, possibly, the establishment of strong source-sink relationships. It has been proposed that the meristems that undergo arrest at the end of the reproductive phase behave at the transcriptomic level as dormant meristems, with low mitotic activity and high expression of abscisic acid response genes. Meristem arrest is also controlled genetically. In Arabidopsis (Arabidopsis thaliana), the MADS-box transcription factor FRUITFULL induces GPA by directly repressing genes of the APETALA2 (AP2) clade. The AP2 genes maintain shoot apical meristem (SAM) activity in part by keeping WUSCHEL expression active, but the mechanisms downstream of this pathway remain elusive. To identify target genes, we performed a transcriptomic analysis, inducing AP2 activity in meristems close to arrest. Our results suggest that AP2 controls meristem arrest by repressing genes related to axillary bud dormancy in the SAM and negative regulators of cytokinin signaling. In addition, our analysis indicates that genes involved in the response to environmental signals also respond to AP2, suggesting that it could modulate the end of flowering by controlling responses to both endogenous and exogenous signals. Our results support the previous observation that at the end of the reproductive phase the arrested SAM behaves as a dormant meristem, and they strongly support AP2 as a master regulator of this process.
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Affiliation(s)
- Irene Martínez-Fernández
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas-Universitat Politècnica de Valencia, 46022 Valencia, Spain
| | - Stéfanie Menezes de Moura
- Department of Genetics, Universidade Federal do Rio de Janeiro, Prédio do Centro do Ciências da Saúde-Instituto de Biologia, Rio de Janeiro, RJ 219410-970, Brazil
| | - Marcio Alves-Ferreira
- Department of Genetics, Universidade Federal do Rio de Janeiro, Prédio do Centro do Ciências da Saúde-Instituto de Biologia, Rio de Janeiro, RJ 219410-970, Brazil
| | - Cristina Ferrándiz
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas-Universitat Politècnica de Valencia, 46022 Valencia, Spain
| | - Vicente Balanzà
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas-Universitat Politècnica de Valencia, 46022 Valencia, Spain
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28
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29
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Chen T, Zhang H, Zeng R, Wang X, Huang L, Wang L, Wang X, Zhang L. Shade Effects on Peanut Yield Associate with Physiological and Expressional Regulation on Photosynthesis and Sucrose Metabolism. Int J Mol Sci 2020; 21:ijms21155284. [PMID: 32722456 PMCID: PMC7432592 DOI: 10.3390/ijms21155284] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 07/15/2020] [Accepted: 07/20/2020] [Indexed: 01/07/2023] Open
Abstract
Intercropping improves land utilization with more crops grown together; however, shorter crops in intercropping experience stress, being shaded by the taller crops. Systematic changes in phenotype, physiology, yield, and gene regulation under shade stress in peanut are largely unknown, although shade responses have been well analyzed in model plants. We exposed peanut plants to simulated 40% and 80% shade for 15 and 30 days at the seedling stage, flowering stage, and both stages. Shade caused the increased elongation growth of the main stem, internode, and leaf, and elongation was positively associated with auxin levels. Shade stress reduced peanut yield. Further comparative RNA-seq analyses revealed expressional changes in many metabolism pathways and common core sets of expressional regulations in all shade treatments. Expressional downregulation of most genes for light-harvesting and photosynthesis agreed with the observed decreased parameters of photosynthesis processes. Other major regulations included expressional downregulation of most core genes in the sucrose and starch metabolism, and growth-promoting genes in plant hormone signal pathways. Together, the results advance our understanding of physiological and molecular regulation in shade avoidance in peanut, which could guide the breeding designing in the intercropping system.
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Affiliation(s)
- Tingting Chen
- Guangdong Key Laboratory of Plant Molecular Breeding, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; (T.C.); (H.Z.); (R.Z.); (X.W.); (L.H.); (L.W.)
| | - Huajian Zhang
- Guangdong Key Laboratory of Plant Molecular Breeding, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; (T.C.); (H.Z.); (R.Z.); (X.W.); (L.H.); (L.W.)
| | - Ruier Zeng
- Guangdong Key Laboratory of Plant Molecular Breeding, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; (T.C.); (H.Z.); (R.Z.); (X.W.); (L.H.); (L.W.)
| | - Xinyue Wang
- Guangdong Key Laboratory of Plant Molecular Breeding, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; (T.C.); (H.Z.); (R.Z.); (X.W.); (L.H.); (L.W.)
| | - Luping Huang
- Guangdong Key Laboratory of Plant Molecular Breeding, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; (T.C.); (H.Z.); (R.Z.); (X.W.); (L.H.); (L.W.)
| | - Leidi Wang
- Guangdong Key Laboratory of Plant Molecular Breeding, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; (T.C.); (H.Z.); (R.Z.); (X.W.); (L.H.); (L.W.)
| | - Xuewen Wang
- Department of Genetics, University of Georgia, Athens, GA 30602, USA
- Correspondence: (X.W.); (L.Z.)
| | - Lei Zhang
- Guangdong Key Laboratory of Plant Molecular Breeding, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; (T.C.); (H.Z.); (R.Z.); (X.W.); (L.H.); (L.W.)
- Correspondence: (X.W.); (L.Z.)
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30
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Jiang J, Xiao Y, Chen H, Hu W, Zeng L, Ke H, Ditengou FA, Devisetty U, Palme K, Maloof J, Dehesh K. Retrograde Induction of phyB Orchestrates Ethylene-Auxin Hierarchy to Regulate Growth. PLANT PHYSIOLOGY 2020; 183:1268-1280. [PMID: 32430463 PMCID: PMC7333703 DOI: 10.1104/pp.20.00090] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 05/11/2020] [Indexed: 05/19/2023]
Abstract
Exquisitely regulated plastid-to-nucleus communication by retrograde signaling pathways is essential for fine-tuning of responses to the prevailing environmental conditions. The plastidial retrograde signaling metabolite methylerythritol cyclodiphosphate (MEcPP) has emerged as a stress signal transduced into a diverse ensemble of response outputs. Here, we demonstrate enhanced phytochrome B protein abundance in red light-grown MEcPP-accumulating ceh1 mutant Arabidopsis (Arabidopsis thaliana) plants relative to wild-type seedlings. We further establish MEcPP-mediated coordination of phytochrome B with auxin and ethylene signaling pathways and uncover differential hypocotyl growth of red light-grown seedlings in response to these phytohormones. Genetic and pharmacological interference with ethylene and auxin pathways outlines the hierarchy of responses, placing ethylene epistatic to the auxin signaling pathway. Collectively, our findings establish a key role of a plastidial retrograde metabolite in orchestrating the transduction of a repertoire of signaling cascades. This work positions plastids at the zenith of relaying information coordinating external signals and internal regulatory circuitry to secure organismal integrity.
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Affiliation(s)
- Jishan Jiang
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, California 92521
| | - Yanmei Xiao
- Department of Molecular and Cellular Biology, University of California, Davis, California 95616
- University of Freiburg, Faculty of Biology, BIOSS Centre for Biological Signaling Studies and ZBSA Centre for Biosystems Studies, 79104 Freiburg, Germany
| | - Hao Chen
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, California 92521
| | - Wei Hu
- Department of Molecular and Cellular Biology, University of California, Davis, California 95616
| | - Liping Zeng
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, California 92521
| | - Haiyan Ke
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, California 92521
| | - Franck A Ditengou
- Department of Plant Biology, University of California, Davis, California 95616
| | - Upendra Devisetty
- University of Freiburg, Faculty of Biology, BIOSS Centre for Biological Signaling Studies and ZBSA Centre for Biosystems Studies, 79104 Freiburg, Germany
| | - Klaus Palme
- Department of Plant Biology, University of California, Davis, California 95616
| | - Julin Maloof
- University of Freiburg, Faculty of Biology, BIOSS Centre for Biological Signaling Studies and ZBSA Centre for Biosystems Studies, 79104 Freiburg, Germany
| | - Katayoon Dehesh
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, California 92521
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Kebrom TH, McKinley BA, Mullet JE. Shade signals alter the expression of circadian clock genes in newly-formed bioenergy sorghum internodes. PLANT DIRECT 2020; 4:e00235. [PMID: 32607464 PMCID: PMC7315773 DOI: 10.1002/pld3.235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 05/26/2020] [Accepted: 05/27/2020] [Indexed: 06/11/2023]
Abstract
Stem internodes of bioenergy sorghum inbred R.07020 are longer at high plant density (shade) than at low plant density (control). Initially, the youngest newly-formed subapical stem internodes of shade-treated and control plants are comparable in length. However, full-length internodes of shade-treated plants are three times longer than the internodes of the control plants. To identify the early molecular events associated with internode elongation in response to shade, we analyzed the transcriptome of the newly-formed internodes of shade-treated and control plants sampled between 4 and 6 hr after the start of the light period (14 hr light/10 hr dark). Sorghum genes homologous to the Arabidopsis shade marker genes ATHB2 and PIL1 were not differentially expressed. The results indicate that shade signals promote internode elongation indirectly because sorghum internodes are not illuminated and grow while enclosed with leaf sheaths. Sorghum genes homologous to the Arabidopsis morning-phased circadian clock genes LHY, RVE, and LNK were downregulated and evening-phased genes such as TOC1, PRR5, and GI were upregulated in young internodes in response to shade. We hypothesize that a change in the function or patterns of expression of the circadian clock genes is the earliest molecular event associated with internode elongation in response to shade in bioenergy sorghum. Increased expression of CycD1, which promotes cell division, and decreased expression of cell wall-loosening and MBF1-like genes, which promote cell expansion, suggest that shade signals promote internode elongation in bioenergy sorghum in part through increasing cell number by delaying transition from cell division to cell expansion.
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Affiliation(s)
- Tesfamichael H. Kebrom
- Cooperative Agricultural Research CenterCollege of Agriculture and Human SciencesPrairie View A&M UniversityPrairie ViewTXUSA
- Center for Computational Systems BiologyCollege of EngineeringPrairie View A&M UniversityPrairie ViewTXUSA
- Department of Biochemistry and BiophysicsTexas A&M UniversityCollege StationTXUSA
| | - Brian A. McKinley
- Department of Biochemistry and BiophysicsTexas A&M UniversityCollege StationTXUSA
| | - John E. Mullet
- Department of Biochemistry and BiophysicsTexas A&M UniversityCollege StationTXUSA
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32
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Botterweg-Paredes E, Blaakmeer A, Hong SY, Sun B, Mineri L, Kruusvee V, Xie Y, Straub D, Ménard D, Pesquet E, Wenkel S. Light affects tissue patterning of the hypocotyl in the shade-avoidance response. PLoS Genet 2020; 16:e1008678. [PMID: 32203519 PMCID: PMC7153905 DOI: 10.1371/journal.pgen.1008678] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 04/13/2020] [Accepted: 02/18/2020] [Indexed: 11/18/2022] Open
Abstract
Plants have evolved strategies to avoid shade and optimize the capture of sunlight. While some species are tolerant to shade, plants such as Arabidopsis thaliana are shade-intolerant and induce elongation of their hypocotyl to outcompete neighboring plants. We report the identification of a developmental module acting downstream of shade perception controlling vascular patterning. We show that Arabidopsis plants react to shade by increasing the number and types of water-conducting tracheary elements in the vascular cylinder to maintain vascular density constant. Mutations in genes affecting vascular patterning impair the production of additional xylem and also show defects in the shade-induced hypocotyl elongation response. Comparative analysis of the shade-induced transcriptomes revealed differences between wild type and vascular patterning mutants and it appears that the latter mutants fail to induce sets of genes encoding biosynthetic and cell wall modifying enzymes. Our results thus set the stage for a deeper understanding of how growth and patterning are coordinated in a dynamic environment. Shade sensitive plants such as Arabidopsis respond to shade by growing tall in order to maximize their access to sunlight. We find that the REVOLUTA (REV) and KANADI1 (KAN1) transcription factors which are primarily involved in patterning the early leaf, impinge on the regulation of WUSCHEL HOMEOBOX4 (WOX4), another transcription factor involved in vascular development. The regulation of WOX4 leads to an increase of the number of water-conducting xylem cells in response to shade. Consequently, mutations in the genes encoding either REV, KAN1 or WOX4 are impaired in their ability to grow tall in shade. Thus, we have uncovered a connection between basic patterning and adaptive growth.
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Affiliation(s)
- Esther Botterweg-Paredes
- Copenhagen Plant Science Centre, University of Copenhagen, Thorvaldsensvej, Denmark
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Anko Blaakmeer
- Copenhagen Plant Science Centre, University of Copenhagen, Thorvaldsensvej, Denmark
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Shin-Young Hong
- Copenhagen Plant Science Centre, University of Copenhagen, Thorvaldsensvej, Denmark
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Bin Sun
- Copenhagen Plant Science Centre, University of Copenhagen, Thorvaldsensvej, Denmark
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Lorenzo Mineri
- Copenhagen Plant Science Centre, University of Copenhagen, Thorvaldsensvej, Denmark
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
- Department of Biosciences, University of Milan, Milan, Italy
| | - Valdeko Kruusvee
- Copenhagen Plant Science Centre, University of Copenhagen, Thorvaldsensvej, Denmark
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Yakun Xie
- Centre for Plant Molecular Biology (ZMBP), University of Tübingen, Germany
| | - Daniel Straub
- Quantitative Biology Center (QBiC), University of Tübingen, Auf der Morgenstelle, Tübingen, Germany
- Microbial Ecology, Center for Applied Geoscience, University of Tübingen, Tübingen, Germany
| | - Delphine Ménard
- Arrhenius Laboratories, Department of Ecology, Environment and Plant Sciences (DEEP), Stockholm University, Stockholm, Sweden
| | - Edouard Pesquet
- Arrhenius Laboratories, Department of Ecology, Environment and Plant Sciences (DEEP), Stockholm University, Stockholm, Sweden
| | - Stephan Wenkel
- Copenhagen Plant Science Centre, University of Copenhagen, Thorvaldsensvej, Denmark
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
- Centre for Plant Molecular Biology (ZMBP), University of Tübingen, Germany
- NovoCrops Center, University of Copenhagen, Thorvaldsensvej, Denmark
- * E-mail:
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True JH, Shaw SL. Exogenous Auxin Induces Transverse Microtubule Arrays Through TRANSPORT INHIBITOR RESPONSE1/AUXIN SIGNALING F-BOX Receptors. PLANT PHYSIOLOGY 2020; 182:892-907. [PMID: 31767691 PMCID: PMC6997688 DOI: 10.1104/pp.19.00928] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 11/10/2019] [Indexed: 05/12/2023]
Abstract
Auxin plays a central role in controlling plant cell growth and morphogenesis. Application of auxin to light-grown seedlings elicits both axial growth and transverse patterning of the cortical microtubule cytoskeleton in hypocotyl cells. Microtubules respond to exogenous auxin within 5 min, although repatterning of the array does not initiate until 30 min after application and is complete by 2 h. To examine the requirements for auxin-induced microtubule array patterning, we used an Arabidopsis (Arabidopsis thaliana) double auxin f-box (afb) receptor mutant, afb4-8 afb5-5, that responds to conventional auxin (indole-3-acetic acid) but has a strongly diminished response to the auxin analog, picloram. We show that 5 µm picloram induces immediate changes to microtubule density and later transverse microtubule patterning in wild-type plants, but does not cause microtubule array reorganization in the afb4-8 afb5-5 mutant. Additionally, a dominant mutant (axr2-1) for the auxin coreceptor AUXIN RESPONSIVE2 (AXR2) was strongly suppressed for auxin-induced microtubule array reorganization, providing additional evidence that auxin functions through a transcriptional pathway for transverse patterning. We observed that brassinosteroid application mimicked the auxin response, showing both early and late microtubule array effects, and induced transverse patterning in the axr2-1 mutant. Application of auxin to the brassinosteroid synthesis mutant, diminuto1, induced transverse array patterning but did not produce significant axial growth. Thus, exogenous auxin induces transverse microtubule patterning through the TRANSPORT INHIBITOR 1/AUXIN F-BOX (TIR1/AFB) transcriptional pathway and can act independently of brassinosteroids.
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Affiliation(s)
- Jillian H True
- Department of Biology, Indiana University, Bloomington, Indiana 47405
| | - Sidney L Shaw
- Department of Biology, Indiana University, Bloomington, Indiana 47405
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Wang X, Gao X, Liu Y, Fan S, Ma Q. Progress of Research on the Regulatory Pathway of the Plant Shade-Avoidance Syndrome. FRONTIERS IN PLANT SCIENCE 2020; 11:439. [PMID: 32351535 PMCID: PMC7174782 DOI: 10.3389/fpls.2020.00439] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 03/25/2020] [Indexed: 05/03/2023]
Abstract
When subject to vegetational shading, shade-avoiding plants detect neighbors by perceiving reduced light quantity and altered light quality. The former includes decreases in the ratio of red to far-red wavelengths (low R:FR) and low blue light ratio (LBL) predominantly detected by phytochromes and cryptochromes, respectively. By integrating multiple signals, plants generate a suite of responses, such as elongation of a variety of organs, accelerated flowering, and reduced branching, which are collectively termed the shade-avoidance syndrome (SAS). To trigger the SAS, interactions between photoreceptors and phytochrome-interacting factors are the general switch for activation of downstream signaling pathways. A number of transcription factor families and phytohormones, especially auxin, gibberellins, ethylene, and brassinosteroids, are involved in the SAS processes. In this review, shade signals, the major photoreceptors involved, and the phenotypic characteristics of the shade-intolerant plant Arabidopsis thaliana are described in detail. In addition, integration of the signaling mechanisms that link photoreceptors with multiple hormone signaling pathways is presented and future research directions are discussed.
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Affiliation(s)
- Xiaoyan Wang
- College of Biology and Food Engineering, Anyang Institute of Technology, Anyang, China
| | - Xinqiang Gao
- College of Biology and Food Engineering, Anyang Institute of Technology, Anyang, China
| | - Yuling Liu
- College of Biology and Food Engineering, Anyang Institute of Technology, Anyang, China
| | - Shuli Fan
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAAS, Anyang, China
- Research Base, Anyang Institute of Technology, State Key Laboratory of Cotton Biology, Anyang, China
- *Correspondence: Shuli Fan, ; Qifeng Ma,
| | - Qifeng Ma
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAAS, Anyang, China
- Research Base, Anyang Institute of Technology, State Key Laboratory of Cotton Biology, Anyang, China
- *Correspondence: Shuli Fan, ; Qifeng Ma,
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35
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Orthogonal regulation of phytochrome B abundance by stress-specific plastidial retrograde signaling metabolite. Nat Commun 2019; 10:2904. [PMID: 31266952 PMCID: PMC6606753 DOI: 10.1038/s41467-019-10867-w] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 06/04/2019] [Indexed: 11/30/2022] Open
Abstract
Plant survival necessitates constant monitoring of fluctuating light and balancing growth demands with adaptive responses, tasks mediated via interconnected sensing and signaling networks. Photoreceptor phytochrome B (phyB) and plastidial retrograde signaling metabolite methylerythritol cyclodiphosphate (MEcPP) are evolutionarily conserved sensing and signaling components eliciting responses through unknown connection(s). Here, via a suppressor screen, we identify two phyB mutant alleles that revert the dwarf and high salicylic acid phenotypes of the high MEcPP containing mutant ceh1. Biochemical analyses show high phyB protein levels in MEcPP-accumulating plants resulting from reduced expression of phyB antagonists and decreased auxin levels. We show that auxin treatment negatively regulates phyB abundance. Additional studies identify CAMTA3, a MEcPP-activated calcium-dependent transcriptional regulator, as critical for maintaining phyB abundance. These studies provide insights into biological organization fundamentals whereby a signal from a single plastidial metabolite is transduced into an ensemble of regulatory networks controlling the abundance of phyB, positioning plastids at the information apex directing adaptive responses. MEcPP is an evolutionarily conserved metabolite that acts as a plastid-to-nucleus retrograde signal to regulate adaptive responses to fluctuating light. Here the authors show that MEcPP regulates seedling development by stabilizing the phyB photoreceptor in an auxin and Ca2+ dependent manner.
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36
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Ranade SS, Delhomme N, García-Gil MR. Transcriptome analysis of shade avoidance and shade tolerance in conifers. PLANTA 2019; 250:299-318. [PMID: 31028482 DOI: 10.1007/s00425-019-03160-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 04/02/2019] [Indexed: 05/26/2023]
Abstract
Gymnosperms respond differently to light intensity and R:FR; although some aspects of shade response appear conserved, yet underlying mechanisms seem to be diverse in gymnosperms as compared to angiosperms. Shade avoidance syndrome (SAS) is well-characterized in the shade intolerant model species Arabidopsis thaliana whereas much less is known about shade tolerance response (STR), yet regulation of SAS and STR with reference to conifers remains poorly understood. We conducted a comparative study of two conifer species with contrasting responses to shade, Scots pine (shade-intolerant) and Norway spruce (shade-tolerant), with the aim to understand mechanisms behind SAS and STR in conifers. Pine and spruce seedlings were grown under controlled light and shade conditions, and hypocotyl and seedling elongation following different light treatments were determined in both species as indicators of shade responses. Red to far-red light ratio (R:FR) was shown to trigger the shade response in Norway spruce. In Scots pine, we observed an interaction between R:FR and light intensity. RNA sequencing (RNA-Seq) data revealed that SAS and STR responses included changes in expression of genes involved primarily in hormone signalling and pigment biosynthesis. From the RNA-Seq analysis, we propose that although some aspects of shade response appear to be conserved in angiosperms and gymnosperms, yet the underlying mechanisms may be different in gymnosperms that warrants further research.
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Affiliation(s)
- Sonali Sachin Ranade
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, 901 87, Umeå, Sweden
| | - Nicolas Delhomme
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden
| | - María Rosario García-Gil
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden.
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Lorenzo CD, Alonso Iserte J, Sanchez Lamas M, Antonietti MS, Garcia Gagliardi P, Hernando CE, Dezar CAA, Vazquez M, Casal JJ, Yanovsky MJ, Cerdán PD. Shade delays flowering in Medicago sativa. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 99:7-22. [PMID: 30924988 DOI: 10.1111/tpj.14333] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 03/01/2019] [Accepted: 03/25/2019] [Indexed: 05/13/2023]
Abstract
Shade-intolerant plants respond to the decrease in the red (R) to far-red (FR) light ratio (R:FR) occurring under shade by elongating stems and petioles and by re-positioning leaves, in a race to outcompete neighbors for the sunlight resource. In some annual species, the shade avoidance syndrome (SAS) is accompanied by the early induction of flowering. Anticipated flowering is viewed as a strategy to set seeds before the resources become severely limiting. Little is known about the molecular mechanisms of SAS in perennial forage crops like alfalfa (Medicago sativa). To study SAS in alfalfa, we exposed alfalfa plants to simulated shade by supplementing with FR light. Low R:FR light produced a classical SAS, with increased internode and petiole lengths, but unexpectedly also with delayed flowering. To understand the molecular mechanisms involved in uncoupling SAS from early flowering, we used a transcriptomic approach. The SAS is likely to be mediated by increased expression of msPIF3 and msHB2 in low R:FR light. Constitutive expression of these genes in Arabidopsis led to SAS, including early flowering, strongly suggesting that their roles are conserved. Delayed flowering was likely to be mediated by the downregulation of msSPL3, which promotes flowering in both Arabidopsis and alfalfa. Shade-delayed flowering in alfalfa may be important to extend the vegetative phase under suboptimal light conditions, and thus assure the accumulation of reserves necessary to resume growth after the next season.
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Affiliation(s)
- Christian D Lorenzo
- Fundación Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires, CONICET, C1405BWE, Buenos Aires, Argentina
| | - Javier Alonso Iserte
- Fundación Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires, CONICET, C1405BWE, Buenos Aires, Argentina
| | - Maximiliano Sanchez Lamas
- Fundación Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires, CONICET, C1405BWE, Buenos Aires, Argentina
| | - Mariana Sofia Antonietti
- Fundación Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires, CONICET, C1405BWE, Buenos Aires, Argentina
| | - Pedro Garcia Gagliardi
- Fundación Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires, CONICET, C1405BWE, Buenos Aires, Argentina
| | - Carlos E Hernando
- Fundación Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires, CONICET, C1405BWE, Buenos Aires, Argentina
| | - Carlos Alberto A Dezar
- Instituto de Agrobiotecnología de Rosario (INDEAR), CONICET, S2000EZP, Rosario, Argentina
| | - Martin Vazquez
- Instituto de Agrobiotecnología de Rosario (INDEAR), CONICET, S2000EZP, Rosario, Argentina
| | - Jorge J Casal
- Fundación Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires, CONICET, C1405BWE, Buenos Aires, Argentina
- Instituto de Fisiología vegetal, Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA), Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Marcelo J Yanovsky
- Fundación Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires, CONICET, C1405BWE, Buenos Aires, Argentina
| | - Pablo D Cerdán
- Fundación Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires, CONICET, C1405BWE, Buenos Aires, Argentina
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38
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Ma L, Li G. Auxin-Dependent Cell Elongation During the Shade Avoidance Response. FRONTIERS IN PLANT SCIENCE 2019; 10:914. [PMID: 31354778 PMCID: PMC6640469 DOI: 10.3389/fpls.2019.00914] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 06/27/2019] [Indexed: 05/18/2023]
Abstract
Plant uses multiple photoreceptors and downstream components to rapidly respond to dynamic changes in environmental light. Under shade conditions, many species exhibit shade avoidance responses that promote stem and petiole elongation, thus helping plants reach the sunlight. In the last few years, the regulatory molecular mechanisms by which plants respond to shade signals have been intensively studied. This review discusses the regulatory mechanisms underlying auxin-mediated cell elongation in the shade avoidance responses. In the early response to shade signals, auxin biosynthesis, transport, and sensitivity are all rapidly activated, thus promoting cell elongation of the hypocotyls and other organs. Under prolonged shade, increased auxin sensitivity-rather than increased auxin biosynthesis-plays a major role in cell elongation. In addition, we discuss the interaction network of photoreceptors and Phytochrome-Interacting Factors, and the antagonistic regulation of Auxin/Indole Acetic Acid proteins by auxin and light. This review provides perspectives to reframe how we think about shade responses in the natural environment.
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Affiliation(s)
- Lin Ma
- College of Life Science and Technology, Jinan University, Jinan, China
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
- *Correspondence: Lin Ma,
| | - Gang Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
- Gang Li,
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39
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Sessa G, Carabelli M, Possenti M, Morelli G, Ruberti I. Multiple Pathways in the Control of the Shade Avoidance Response. PLANTS 2018; 7:plants7040102. [PMID: 30453622 PMCID: PMC6313891 DOI: 10.3390/plants7040102] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 11/13/2018] [Accepted: 11/14/2018] [Indexed: 01/09/2023]
Abstract
To detect the presence of neighboring vegetation, shade-avoiding plants have evolved the ability to perceive and integrate multiple signals. Among them, changes in light quality and quantity are central to elicit and regulate the shade avoidance response. Here, we describe recent progresses in the comprehension of the signaling mechanisms underlying the shade avoidance response, focusing on Arabidopsis, because most of our knowledge derives from studies conducted on this model plant. Shade avoidance is an adaptive response that results in phenotypes with a high relative fitness in individual plants growing within dense vegetation. However, it affects the growth, development, and yield of crops, and the design of new strategies aimed at attenuating shade avoidance at defined developmental stages and/or in specific organs in high-density crop plantings is a major challenge for the future. For this reason, in this review, we also report on recent advances in the molecular description of the shade avoidance response in crops, such as maize and tomato, and discuss their similarities and differences with Arabidopsis.
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Affiliation(s)
- Giovanna Sessa
- Institute of Molecular Biology and Pathology, National Research Council, 00185 Rome, Italy.
| | - Monica Carabelli
- Institute of Molecular Biology and Pathology, National Research Council, 00185 Rome, Italy.
| | - Marco Possenti
- Research Centre for Genomics and Bioinformatics, Council for Agricultural Research and Economics (CREA), 00178 Rome, Italy.
| | - Giorgio Morelli
- Research Centre for Genomics and Bioinformatics, Council for Agricultural Research and Economics (CREA), 00178 Rome, Italy.
| | - Ida Ruberti
- Institute of Molecular Biology and Pathology, National Research Council, 00185 Rome, Italy.
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40
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Changes in resource partitioning between and within organs support growth adjustment to neighbor proximity in Brassicaceae seedlings. Proc Natl Acad Sci U S A 2018; 115:E9953-E9961. [PMID: 30275313 PMCID: PMC6196536 DOI: 10.1073/pnas.1806084115] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
In dense communities, plants compete for light and sense potentially threatening neighbors prior to actual shading. In response to neighbor proximity cues, shade-intolerant plants selectively elongate stem-like structures, thereby enhancing access to unfiltered sunlight. Although key steps in plant proximity sensing and signaling have been identified, we know little about the metabolic adaptations underlying enhanced stem growth. Here, we show that, following the detection of neighbor proximity cues, seedlings allocate more carbon fixed in the cotyledons to the faster elongating hypocotyl. Moreover, we show that sucrose transport and a transcription factor responding to light and metabolic cues control hypocotyl elongation. Collectively, our work provides important insights into the metabolic changes underlying organ-specific growth adaptations to an environmental stress signal. In shade-intolerant plants, the perception of proximate neighbors rapidly induces architectural changes resulting in elongated stems and reduced leaf size. Sensing and signaling steps triggering this modified growth program have been identified. However, the underlying changes in resource allocation that fuel stem growth remain poorly understood. Through 14CO2 pulse labeling of Brassica rapa seedlings, we show that perception of the neighbor detection signal, low ratio of red to far-red light (R:FR), leads to increased carbon allocation from the major site of photosynthesis (cotyledons) to the elongating hypocotyl. While carbon fixation and metabolite levels remain similar in low R:FR, partitioning to all downstream carbon pools within the hypocotyl is increased. Genetic analyses using Arabidopsis thaliana mutants indicate that low-R:FR–induced hypocotyl elongation requires sucrose transport from the cotyledons and is regulated by a PIF7-dependent metabolic response. Moreover, our data suggest that starch metabolism in the hypocotyl has a growth-regulatory function. The results reveal a key mechanism by which metabolic adjustments can support rapid growth adaptation to a changing environment.
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41
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Kim S, Mochizuki N, Deguchi A, Nagano AJ, Suzuki T, Nagatani A. Auxin Contributes to the Intraorgan Regulation of Gene Expression in Response to Shade. PLANT PHYSIOLOGY 2018; 177:847-862. [PMID: 29728454 PMCID: PMC6001317 DOI: 10.1104/pp.17.01259] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 04/03/2018] [Indexed: 05/20/2023]
Abstract
Plants sense and respond to light via multiple photoreceptors including phytochrome. The decreased ratio of red to far-red light that occurs under a canopy triggers shade-avoidance responses, which allow plants to compete with neighboring plants. The leaf acts as a photoperceptive organ in this response. In this study, we investigated how the shade stimulus is spatially processed within the cotyledon. We performed transcriptome analysis on microtissue samples collected from vascular and nonvascular regions of Arabidopsis (Arabidopsis thaliana) cotyledons. In addition, we mechanically isolated and analyzed the vascular tissue. More genes were up-regulated by the shade stimulus in vascular tissues than in mesophyll and epidermal tissues. The genes up-regulated in the vasculature were functionally divergent and included many auxin-responsive genes, suggesting that various physiological/developmental processes might be controlled by shade stimulus in the vasculature. We then investigated the spatial regulation of these genes in the vascular tissues. A small vascular region within a cotyledon was irradiated with far-red light, and the response was compared with that when the whole seedling was irradiated with far-red light. Most of the auxin-responsive genes were not fully induced by the local irradiation, suggesting that perception of the shade stimulus requires that a wider area be exposed to far-red light or that a certain position in the mesophyll and epidermis of the cotyledon be irradiated. This result was consistent with a previous report that auxin synthesis genes are up-regulated in the periphery of the cotyledon. Hence, auxin acts as an important intraorgan signaling factor that controls the vascular shade response within the cotyledon.
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Affiliation(s)
- Sujung Kim
- Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | | | - Ayumi Deguchi
- Faculty of Agriculture, Ryukoku University, Otsu 520-2194, Japan
| | - Atsushi J Nagano
- Faculty of Agriculture, Ryukoku University, Otsu 520-2194, Japan
| | - Tomomi Suzuki
- Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Akira Nagatani
- Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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42
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Tonello L, Gashi B, Scuotto A, Cappello G, Cocchi M, Gabrielli F, Tuszynski JA. The gastrointestinal-brain axis in humans as an evolutionary advance of the root-leaf axis in plants: A hypothesis linking quantum effects of light on serotonin and auxin. J Integr Neurosci 2018. [DOI: 10.3233/jin-170048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
| | - Bekim Gashi
- Department of Biology, University of Prishtina “Hasan Prishtina”, Prishtina, 10000, Kosovo
| | | | | | | | | | - Jack A. Tuszynski
- Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2J1, Canada
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43
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Zhou Y, Zhang D, An J, Yin H, Fang S, Chu J, Zhao Y, Li J. TCP Transcription Factors Regulate Shade Avoidance via Directly Mediating the Expression of Both PHYTOCHROME INTERACTING FACTORs and Auxin Biosynthetic Genes. PLANT PHYSIOLOGY 2018; 176:1850-1861. [PMID: 29254986 PMCID: PMC5813557 DOI: 10.1104/pp.17.01566] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 12/13/2017] [Indexed: 05/20/2023]
Abstract
Light quality surrounding a plant is largely determined by the density of its neighboring vegetation. Plants are able to sense shade light signals and initiate a series of adaptation responses, which is known as shade avoidance syndrome (SAS). PHYTOCHROME INTERACTING FACTORS (PIFs) are key factors in the SAS network by regulating the biosynthesis of multiple phytohormones and the expression of cell expansion genes. Although the protein levels of PIFs were found to be acumulated in shade, the transcriptional regulation of PIFs in response to such an environmental signal remains poorly understood. Here we show that TCP17 and its two closely related homologs, TCP5 and TCP13, play an important role in mediating shade-induced hypocotyl elongation by up-regulating auxin biosynthesis via a PIF-dependent and a PIF-independent pathway. In constitutive white light, a tcp5, 13, 17 triple mutant (3tcp) showed a subtle hypocotyl defective phenotype. In shade, however, 3tcp showed a significantly reduced hypocotyl elongation phenotype, indicating a positive role of TCPs in regulating SAS. Our in-depth biochemical and genetic analyses indicated that TCP17 can be significantly accumulated in shade. TCP17 binds to the promoters of PIFs and YUCCAs to indirectly or directly up-regulate auxin levels in shade. These data provide new insights into our better understanding of the regulatory mechanisms of SAS in plants.
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Affiliation(s)
- Yu Zhou
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Dongzhi Zhang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Jiaxing An
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Hongju Yin
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Shuang Fang
- National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Jinfang Chu
- National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Yunde Zhao
- Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, California 92093-0116
| | - Jia Li
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
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Iglesias MJ, Sellaro R, Zurbriggen MD, Casal JJ. Multiple links between shade avoidance and auxin networks. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:213-228. [PMID: 29036463 DOI: 10.1093/jxb/erx295] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Auxin has emerged as a key player in the adjustment of plant morphology to the challenge imposed by variable environmental conditions. Shade-avoidance responses, including the promotion of stem and petiole growth, leaf hyponasty, and the inhibition of branching, involve an intimate connection between light and auxin signalling. Low activity of photo-sensory receptors caused by the presence of neighbouring vegetation enhances the activity of PHYTOCHROME INTERACTING FACTORs (PIFs), which directly promote the expression of genes involved in auxin biosynthesis, conjugation, transport, perception, and signalling. In seedlings, neighbour signals increase auxin levels in the foliage, which then moves to the stem, where it reaches epidermal tissues to promote growth. However, this model only partially accounts for shade-avoidance responses (which may also occur in the absence of increased auxin levels), and understanding the whole picture will require further insight into the functional significance of the multiple links between shade and auxin networks.
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Affiliation(s)
- María José Iglesias
- Instituto de Investigaciones Biológicas, CONICET-Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales, Argentina
| | - Romina Sellaro
- IFEVA, Universidad de Buenos Aires and CONICET, Facultad de Agronomía, Argentina
| | - Matias D Zurbriggen
- Institute of Synthetic Biology and Cluster of Excellence on Plant Sciences (CEPLAS), University of Düsseldorf, Germany
| | - Jorge José Casal
- IFEVA, Universidad de Buenos Aires and CONICET, Facultad de Agronomía, Argentina
- Fundación Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires-CONICET, Argentina
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Katarzyna Banas A, Hermanowicz P, Sztatelman O, Labuz J, Aggarwal C, Zglobicki P, Jagiello-Flasinska D, Strzalka W. 6,4-PP Photolyase Encoded by AtUVR3 is Localized in Nuclei, Chloroplasts and Mitochondria and its Expression is Down-Regulated by Light in a Photosynthesis-Dependent Manner. PLANT & CELL PHYSIOLOGY 2018; 59:44-57. [PMID: 29069446 DOI: 10.1093/pcp/pcx159] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 10/19/2017] [Indexed: 05/04/2023]
Abstract
Pyrimidine dimers are the most important DNA lesions induced by UVB irradiation. They can be repaired directly by photoreactivation or indirectly by the excision repair pathways. Photoreactivation is carried out by photolyases, enzymes which bind to the dimers and use the energy of blue light or UVA to split bonds between adjacent pyrimidines. Arabidopsis thaliana has three known photolyases: AtPHR1, AtCRY3 and AtUVR3. Little is known about the cellular localization and regulation of AtUVR3 expression. We have found that its transcript level is down-regulated by light (red, blue or white) in a photosynthesis-dependent manner. The down-regulatory effect of red light is absent in mature leaves of the phyB mutant, but present in leaves of phyAphyB. UVB irradiation does not increase AtUVR3 expression in leaves. Transiently expressed AtUVR3-green fluorescent protein (GFP) is found in the nuclei, chloroplasts and mitochondria of Nicotiana benthamiana epidermal cells. In the nucleoplasm, AtUVR3-GFP is distributed uniformly, while in the nucleolus it forms speckles. Truncated AtUVR3 and muteins were used to identify the sequences responsible for its subcellular localization. Mitochondrial and chloroplast localization of AtUVR3 is independent of its N-terminal sequence. Amino acids located at the C-terminal loop of the protein are involved in its transport into chloroplasts and its retention inside the nucleolus.
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Affiliation(s)
- Agnieszka Katarzyna Banas
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow, 30-387, Poland
- The Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow, 30-387, Poland
| | - Pawel Hermanowicz
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow, 30-387, Poland
- The Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow, 30-387, Poland
| | - Olga Sztatelman
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow, 30-387, Poland
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warszawa, Poland
| | - Justyna Labuz
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow, 30-387, Poland
- The Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow, 30-387, Poland
| | - Chhavi Aggarwal
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow, 30-387, Poland
- Department of Gene Expression, Faculty of Biology, Adam Mickiewicz University, Poznan, 61-614, Poland
| | - Piotr Zglobicki
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow, 30-387, Poland
| | - Dominika Jagiello-Flasinska
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow, 30-387, Poland
| | - Wojciech Strzalka
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, Krakow, 30-387, Poland
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Yang C, Xie F, Jiang Y, Li Z, Huang X, Li L. Phytochrome A Negatively Regulates the Shade Avoidance Response by Increasing Auxin/Indole Acidic Acid Protein Stability. Dev Cell 2018; 44:29-41.e4. [DOI: 10.1016/j.devcel.2017.11.017] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 08/15/2017] [Accepted: 11/20/2017] [Indexed: 11/16/2022]
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Ballaré CL, Pierik R. The shade-avoidance syndrome: multiple signals and ecological consequences. PLANT, CELL & ENVIRONMENT 2017; 40:2530-2543. [PMID: 28102548 DOI: 10.1111/pce.12914] [Citation(s) in RCA: 203] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 01/10/2017] [Accepted: 01/13/2017] [Indexed: 05/18/2023]
Abstract
Plants use photoreceptor proteins to detect the proximity of other plants and to activate adaptive responses. Of these photoreceptors, phytochrome B (phyB), which is sensitive to changes in the red (R) to far-red (FR) ratio of sunlight, is the one that has been studied in greatest detail. The molecular connections between the proximity signal (low R:FR) and a model physiological response (increased elongation growth) have now been mapped in considerable detail in Arabidopsis seedlings. We briefly review our current understanding of these connections and discuss recent progress in establishing the roles of other photoreceptors in regulating growth-related pathways in response to competition cues. We also consider processes other than elongation that are controlled by photoreceptors and contribute to plant fitness under variable light conditions, including photoresponses that optimize the utilization of soil resources. In examining recent advances in the field, we highlight emerging roles of phyB as a major modulator of hormones related to plant immunity, in particular salicylic acid and jasmonic acid (JA). Recent attempts to manipulate connections between light signals and defence in Arabidopsis suggest that it might be possible to improve crop health at high planting densities by targeting links between phyB and JA signalling.
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Affiliation(s)
- Carlos L Ballaré
- IFEVA, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, Ave. San Martín 4453, C1417DSE, Buenos Aires, Argentina
- IIB-INTECH, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de San Martín, B1650HMP, Buenos Aires, Argentina
| | - Ronald Pierik
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands
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Napoleão TA, Soares G, Vital CE, Bastos C, Castro R, Loureiro ME, Giordano A. Methyl jasmonate and salicylic acid are able to modify cell wall but only salicylic acid alters biomass digestibility in the model grass Brachypodium distachyon. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2017; 263:46-54. [PMID: 28818383 DOI: 10.1016/j.plantsci.2017.06.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Revised: 06/28/2017] [Accepted: 06/30/2017] [Indexed: 06/07/2023]
Abstract
In addition to playing a key role in the response to environmental changes, cell walls are also considered as a valuable feedstock for cellulosic ethanol. Here we explored the effects of the stress-response hormones, salicylic acid and methyl jasmonate, on cell wall biosynthesis and biomass digestibility in Brachypodium distachyon, a species recently considered as a suitable model for biomass conversion. We found that in response to salicylic acid or methyl jasmonate treatment, plant growth was reduced coupled with significant changes in cell wall composition. Cellulose content increased in response to methyl jasmonate whereas a reduction in lignin content was found after salicylic acid application. Moreover, hemicellulose composition was altered and increases in caffeic acid, ferulic acid and p-coumaric acid content were detected in response to both treatments. The hormonal profile and the expression pattern of genes involved in cell wall biosynthesis were also modified. Biomass digestibility was reduced in leaf tissue after salicylic acid treatment and was negatively correlated with ferulic acid and p-coumaric acid content. The results obtained here aid in our understanding of cell wall dynamics in response to stress and will enable the development of new strategies to improve cell wall digestibility in bioenergy feedstock.
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Affiliation(s)
- Thiago Alves Napoleão
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Giuliana Soares
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Camilo Elber Vital
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Carla Bastos
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Robson Castro
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Marcelo Ehlers Loureiro
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Andrea Giordano
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.
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Mawphlang OIL, Kharshiing EV. Photoreceptor Mediated Plant Growth Responses: Implications for Photoreceptor Engineering toward Improved Performance in Crops. FRONTIERS IN PLANT SCIENCE 2017; 8:1181. [PMID: 28744290 PMCID: PMC5504655 DOI: 10.3389/fpls.2017.01181] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 06/20/2017] [Indexed: 05/18/2023]
Abstract
Rising temperatures during growing seasons coupled with altered precipitation rates presents a challenging task of improving crop productivity for overcoming such altered weather patterns and cater to a growing population. Light is a critical environmental factor that exerts a powerful influence on plant growth and development ranging from seed germination to flowering and fruiting. Higher plants utilize a suite of complex photoreceptor proteins to perceive surrounding red/far-red (phytochromes), blue/UV-A (cryptochromes, phototropins, ZTL/FKF1/LKP2), and UV-B light (UVR8). While genomic studies have also shown that light induces extensive reprogramming of gene expression patterns in plants, molecular genetic studies have shown that manipulation of one or more photoreceptors can result in modification of agronomically beneficial traits. Such information can assist researchers to engineer photoreceptors via genome editing technologies to alter expression or even sensitivity thresholds of native photoreceptors for targeting aspects of plant growth that can confer superior agronomic value to the engineered crops. Here we summarize the agronomically important plant growth processes influenced by photoreceptors in crop species, alongwith the functional interactions between different photoreceptors and phytohormones in regulating these responses. We also discuss the potential utility of synthetic biology approaches in photobiology for improving agronomically beneficial traits of crop plants by engineering designer photoreceptors.
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Effects of Light Quality on Growth and Phytonutrient Accumulation of Herbs under Controlled Environments. HORTICULTURAE 2017. [DOI: 10.3390/horticulturae3020036] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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