1
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Zeng J, Duan M, Wang Y, Li G, You Y, Shi J, Liu C, Zhang J, Xu J, Zhang S, Zhao J. Sporophytic control of tapetal development and pollen fertility by a mitogen-activated protein kinase cascade in rice. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2024; 66:1500-1516. [PMID: 38751028 DOI: 10.1111/jipb.13673] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 04/11/2024] [Accepted: 04/14/2024] [Indexed: 07/12/2024]
Abstract
Tapetum, the innermost layer of the anther wall, provides essential nutrients and materials for pollen development. Timely degradation of anther tapetal cells is a prerequisite for normal pollen development in flowering plants. Tapetal cells facilitate male gametogenesis by providing cellular contents after highly coordinated programmed cell death (PCD). Tapetal development is regulated by a transcriptional network. However, the signaling pathway(s) involved in this process are poorly understood. In this study, we report that a mitogen-activated protein kinase (MAPK) cascade composed of OsYDA1/OsYDA2-OsMKK4-OsMPK6 plays an important role in tapetal development and male gametophyte fertility. Loss of function of this MAPK cascade leads to anther indehiscence, enlarged tapetum, and aborted pollen grains. Tapetal cells in osmkk4 and osmpk6 mutants exhibit an increased presence of lipid body-like structures within the cytoplasm, which is accompanied by a delayed occurrence of PCD. Expression of a constitutively active version of OsMPK6 (CA-OsMPK6) can rescue the pollen defects in osmkk4 mutants, confirming that OsMPK6 functions downstream of OsMKK4 in this pathway. Genetic crosses also demonstrated that the MAPK cascade sporophyticly regulates pollen development. Our study reveals a novel function of rice MAPK cascade in plant male reproductive biology.
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Affiliation(s)
- Jianguo Zeng
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Manman Duan
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yiqing Wang
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Guangtao Li
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yujing You
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jie Shi
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Changhao Liu
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jinyang Zhang
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Juan Xu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Shuqun Zhang
- Division of Biochemistry, University of Missouri, Columbia, 65211, MO, USA
| | - Jing Zhao
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, 210095, China
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2
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Wang Y, Xie D, Zheng X, Guo M, Qi Z, Yang P, Yu J, Zhou J. MAPK20-mediated ATG6 phosphorylation is critical for pollen development in Solanum lycopersicum L. HORTICULTURE RESEARCH 2024; 11:uhae069. [PMID: 38725462 PMCID: PMC11079483 DOI: 10.1093/hr/uhae069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 02/25/2024] [Indexed: 05/12/2024]
Abstract
In flowering plants, male gametogenesis is tightly regulated by numerous genes. Mitogen-activated protein kinase (MAPK) plays a critical role in plant development and stress response, while its role in plant reproductive development is largely unclear. The present study demonstrated MAPK20 phosphorylation of ATG6 to mediate pollen development and germination in tomato (Solanum lycopersicum L.). MAPK20 was preferentially expressed in the stamen of tomato, and mutation of MAPK20 resulted in abnormal pollen grains and inhibited pollen viability and germination. MAPK20 interaction with ATG6 mediated the formation of autophagosomes. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis showed that ATG6 was phosphorylated by MAPK20 at Ser-265. Mutation of ATG6 in wild-type (WT) or in MAPK20 overexpression plants resulted in malformed and inviable pollens. Meanwhile, the number of autophagosomes in mapk20 and atg6 mutants was significantly lower than that of WT plants. Our results suggest that MAPK20-mediated ATG6 phosphorylation and autophagosome formation are critical for pollen development and germination.
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Affiliation(s)
- Yu Wang
- Department of Horticulture, Zhejiang University, Hangzhou 310058, China
| | - Dongling Xie
- Department of Horticulture, Zhejiang University, Hangzhou 310058, China
| | - Xuelian Zheng
- Department of Horticulture, Zhejiang University, Hangzhou 310058, China
| | - Mingyue Guo
- Department of Horticulture, Zhejiang University, Hangzhou 310058, China
| | - Zhenyu Qi
- Hainan Institute, Zhejiang University, Sanya 572000, China
- Agricultural Experiment Station, Zhejiang University, Hangzhou 310058, China
| | - Ping Yang
- Agricultural Experiment Station, Zhejiang University, Hangzhou 310058, China
| | - Jingquan Yu
- Department of Horticulture, Zhejiang University, Hangzhou 310058, China
- Hainan Institute, Zhejiang University, Sanya 572000, China
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Hangzhou 310058, China
- Key Laboratory of Horticultural Plants Growth, Development and Quality Improvement, Ministry of Agriculture and Rural Affairs, Hangzhou 310058, China
| | - Jie Zhou
- Department of Horticulture, Zhejiang University, Hangzhou 310058, China
- Hainan Institute, Zhejiang University, Sanya 572000, China
- Shandong (Linyi) Institute of Modern Agriculture, Zhejiang University, Linyi 276000, China
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Hangzhou 310058, China
- Key Laboratory of Horticultural Plants Growth, Development and Quality Improvement, Ministry of Agriculture and Rural Affairs, Hangzhou 310058, China
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3
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Wu M, Zhang Q, Wu G, Zhang L, Xu X, Hu X, Gong Z, Chen Y, Li Z, Li H, Deng W. SlMYB72 affects pollen development by regulating autophagy in tomato. HORTICULTURE RESEARCH 2023; 10:uhac286. [PMID: 36938568 PMCID: PMC10015339 DOI: 10.1093/hr/uhac286] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 12/15/2022] [Indexed: 06/18/2023]
Abstract
The formation and development of pollen are among the most critical processes for reproduction and genetic diversity in the life cycle of flowering plants. The present study found that SlMYB72 was highly expressed in the pollen and tapetum of tomato flowers. Downregulation of SlMYB72 led to a decrease in the amounts of seeds due to abnormal pollen development compared with wild-type plants. Downregulation of SlMYB72 delayed tapetum degradation and inhibited autophagy in tomato anther. Overexpression of SlMYB72 led to abnormal pollen development and delayed tapetum degradation. Expression levels of some autophagy-related genes (ATGs) were decreased in SlMYB72 downregulated plants and increased in overexpression plants. SlMYB72 was directly bound to ACCAAC/ACCAAA motif of the SlATG7 promoter and activated its expression. Downregulation of SlATG7 inhibited the autophagy process and tapetum degradation, resulting in abnormal pollen development in tomatoes. These results indicated SlMYB72 affects the tapetum degradation and pollen development by transcriptional activation of SlATG7 and autophagy in tomato anther. The study expands the understanding of the regulation of autophagy by SlMYB72, uncovers the critical role that autophagy plays in pollen development, and provides potential candidate genes for the production of male-sterility in plants.
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Affiliation(s)
| | | | - Guanle Wu
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 400044, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, 401331 Chongqing, China
| | - Lu Zhang
- Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, OK 74078, USA
| | - Xin Xu
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 400044, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, 401331 Chongqing, China
| | - Xiaowei Hu
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 400044, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, 401331 Chongqing, China
| | - Zehao Gong
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 400044, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, 401331 Chongqing, China
| | - Yulin Chen
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 400044, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, 401331 Chongqing, China
| | - Zhengguo Li
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 400044, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, 401331 Chongqing, China
| | | | - Wei Deng
- Corresponding authors. E-mails: ;
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Yan H, Zhuang M, Xu X, Li S, Yang M, Li N, Du X, Hu K, Peng X, Huang W, Wu H, Tse YC, Zhao L, Wang H. Autophagy and its mediated mitochondrial quality control maintain pollen tube growth and male fertility in Arabidopsis. Autophagy 2023; 19:768-783. [PMID: 35786359 PMCID: PMC9980518 DOI: 10.1080/15548627.2022.2095838] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Macroautophagy/autophagy, a major catabolic pathway in eukaryotes, participates in plant sexual reproduction including the processes of male gametogenesis and the self-incompatibility response. Rapid pollen tube growth is another essential reproductive process that is metabolically highly demanding to drive the vigorous cell growth for delivery of male gametes for fertilization in angiosperms. Whether and how autophagy operates to maintain the homeostasis of pollen tubes remains unknown. Here, we provide evidence that autophagy is elevated in growing pollen tubes and critically required during pollen tube growth and male fertility in Arabidopsis. We demonstrate that SH3P2, a critical non-ATG regulator of plant autophagy, colocalizes with representative ATG proteins during autophagosome biogenesis in growing pollen tubes. Downregulation of SH3P2 expression significantly disrupts Arabidopsis pollen germination and pollen tube growth. Further analysis of organelle dynamics reveals crosstalk between autophagosomes and prevacuolar compartments following the inhibition of phosphatidylinositol 3-kinase. In addition, time-lapse imaging and tracking of ATG8e-labeled autophagosomes and depolarized mitochondria demonstrate that they interact specifically via the ATG8-family interacting motif (AIM)-docking site to mediate mitophagy. Ultrastructural identification of mitophagosomes and two additional forms of autophagosomes imply that multiple types of autophagy are likely to function simultaneously within pollen tubes. Altogether, our results suggest that autophagy is functionally crucial for mediating mitochondrial quality control and canonical cytoplasm recycling during pollen tube growth.Abbreviations: AIM: ATG8-family interacting motif; ATG8: autophagy related 8; ATG5: autophagy related 5; ATG7: autophagy related 7; BTH: acibenzolar-S-methyl; DEX: dexamethasone; DNP: 2,4-dinitrophenol; GFP: green fluorescent protein; YFP: yellow fluorescent protein; PtdIns3K: phosphatidylinositol 3-kinase; PtdIns3P: phosphatidylinositol-3-phosphate; PVC: prevacuolar compartment; SH3P2: SH3 domain-containing protein 2.
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Affiliation(s)
- He Yan
- Department of Cell and Developmental Biology, College of Life Sciences, South China Agricultural University, Guangzhou, Hong Kong, China
| | - Menglong Zhuang
- Department of Cell and Developmental Biology, College of Life Sciences, South China Agricultural University, Guangzhou, Hong Kong, China
| | - Xiaoyu Xu
- Department of Cell and Developmental Biology, College of Life Sciences, South China Agricultural University, Guangzhou, Hong Kong, China
| | - Shanshan Li
- Department of Cell and Developmental Biology, College of Life Sciences, South China Agricultural University, Guangzhou, Hong Kong, China
| | - Mingkang Yang
- Department of Cell and Developmental Biology, College of Life Sciences, South China Agricultural University, Guangzhou, Hong Kong, China.,State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou null China
| | - Nianle Li
- Department of Cell and Developmental Biology, College of Life Sciences, South China Agricultural University, Guangzhou, Hong Kong, China
| | - Xiaojuan Du
- Department of Cell and Developmental Biology, College of Life Sciences, South China Agricultural University, Guangzhou, Hong Kong, China
| | - Kangwei Hu
- Department of Cell and Developmental Biology, College of Life Sciences, South China Agricultural University, Guangzhou, Hong Kong, China
| | - Xiaomin Peng
- Department of Cell and Developmental Biology, College of Life Sciences, South China Agricultural University, Guangzhou, Hong Kong, China
| | - Wei Huang
- Department of Cell and Developmental Biology, College of Life Sciences, South China Agricultural University, Guangzhou, Hong Kong, China.,State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou null China
| | - Hong Wu
- Department of Cell and Developmental Biology, College of Life Sciences, South China Agricultural University, Guangzhou, Hong Kong, China.,State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou null China
| | - Yu Chung Tse
- Core Research Facilities, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Lifeng Zhao
- Department of Cell and Developmental Biology, College of Life Sciences, South China Agricultural University, Guangzhou, Hong Kong, China
| | - Hao Wang
- Department of Cell and Developmental Biology, College of Life Sciences, South China Agricultural University, Guangzhou, Hong Kong, China
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5
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Sharma I, Kirti PB, Pati PK. Autophagy: a game changer for plant development and crop improvement. PLANTA 2022; 256:103. [PMID: 36307739 DOI: 10.1007/s00425-022-04004-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
Manipulation of autophagic pathway represents a tremendous opportunity for designing climate-smart crops with improved yield and better adaptability to changing environment. For exploiting autophagy to its full potential, identification and comprehensive characterization of adapters/receptor complex and elucidation of its regulatory network in crop plants is highly warranted. Autophagy is a major intracellular trafficking pathway in eukaryotes involved in vacuolar degradation of cytoplasmic constituents, mis-folded proteins, and defective organelles. Under optimum conditions, autophagy operates at a basal level to maintain cellular homeostasis, but under stressed conditions, it is induced further to provide temporal stress relief. Our understanding of this highly dynamic process has evolved exponentially in the past few years with special reference to several plant-specific roles of autophagy. Here, we review the most recent advances in the field of autophagy in plants and discuss its potential implications in designing crops with improved stress and disease-tolerance, enhanced yield potential, and improved capabilities for producing metabolites of high economic value. We also assess the current knowledge gaps and the possible strategies to develop a robust module for biotechnological application of autophagy to enhance bioeconomy and sustainability of agriculture.
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Affiliation(s)
- Isha Sharma
- AgriBiotech Foundation, PJTS Agriculture University, Rajendranagar, Hyderabad, Telangana, 500032, India.
- International Crops Research Institute for the Semi-Arid Tropics, 502324, Patancheru, Telangana, India.
| | | | - Pratap Kumar Pati
- Department of Biotechnology, Guru Nanak Dev University, Amritsar, Punjab, 140301, India
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6
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Kong L, Zhuo Y, Xu J, Meng X, Wang Y, Zhao W, Lai H, Chen J, Wang J. Identification of long non-coding RNAs and microRNAs involved in anther development in the tropical Camellia oleifera. BMC Genomics 2022; 23:596. [PMID: 35974339 PMCID: PMC9380326 DOI: 10.1186/s12864-022-08836-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 07/29/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Explored the molecular science of anther development is important for improving productivity and overall yield of crops. Although the role of regulatory RNAs, including long non-coding RNAs (lncRNAs) and microRNAs (miRNAs), in regulating anther development has been established, their identities and functions in Camellia oleifera, an important industrial crop, have yet not been clearly explored. Here, we report the identification and characterization of genes, lncRNAs and miRNAs during three stages of the tropical C. oleifera anther development by single-molecule real-time sequencing, RNA sequencing and small RNA sequencing, respectively. RESULTS These stages, viz. the pollen mother cells stage, tetrad stage and uninucleate pollen stage, were identified by analyzing paraffin sections of floral buds during rapid expansion periods. A total of 18,393 transcripts, 414 putative lncRNAs and 372 miRNAs were identified, of which 5,324 genes, 115 lncRNAs, and 44 miRNAs were differentially accumulated across three developmental stages. Of these, 44 and 92 genes were predicted be regulated by 37 and 30 differentially accumulated lncRNAs and miRNAs, respectively. Additionally, 42 differentially accumulated lncRNAs were predicted as targets of 27 miRNAs. Gene ontology enrichment indicated that potential target genes of lncRNAs were enriched in photosystem II, regulation of autophagy and carbohydrate phosphatase activity, which are essential for anther development. Functional annotation of genes targeted by miRNAs indicated that they are relevant to transcription and metabolic processes that play important roles in microspore development. An interaction network was built with 2 lncRNAs, 6 miRNAs and 10 mRNAs. Among these, miR396 and miR156 family were up-regulated, while their targets, genes (GROWTH REGULATING FACTORS and SQUAMOSA PROMOTER BINDING PROTEIN-LIKE genes) and lncRNAs, were down-regulated. Further, the trans-regulated targets of these lncRNAs, like wall-associated kinase2 and phosphomannose isomerase1, are involved in pollen wall formation during anther development. CONCLUSIONS This study unravels lncRNAs, miRNAs and miRNA-lncRNA-mRNA networks involved in development of anthers of the tropical C. oleifera lays a theoretical foundation for further elucidation of regulatory roles of lncRNAs and miRNAs in anther development.
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Affiliation(s)
- Lingshan Kong
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, 572025, Sanya, P. R. China.,Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education/Engineering Research Center of Rare and Precious Tree Species in Hainan Province, School of Forestry, Hainan University, 570228, Haikou, P. R. China.,School of Horticulture, Hainan University, 570228, Haikou, P. R. China
| | - Yanjing Zhuo
- School of Public Administration, Hainan University, 570228, Haikou, P. R. China
| | - Jieru Xu
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, 572025, Sanya, P. R. China.,Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education/Engineering Research Center of Rare and Precious Tree Species in Hainan Province, School of Forestry, Hainan University, 570228, Haikou, P. R. China
| | - Xiangxu Meng
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, 572025, Sanya, P. R. China.,Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education/Engineering Research Center of Rare and Precious Tree Species in Hainan Province, School of Forestry, Hainan University, 570228, Haikou, P. R. China
| | - Yue Wang
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, 572025, Sanya, P. R. China.,Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education/Engineering Research Center of Rare and Precious Tree Species in Hainan Province, School of Forestry, Hainan University, 570228, Haikou, P. R. China
| | - Wenxiu Zhao
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, 572025, Sanya, P. R. China.,Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education/Engineering Research Center of Rare and Precious Tree Species in Hainan Province, School of Forestry, Hainan University, 570228, Haikou, P. R. China
| | - Hanggui Lai
- School of Tropical Crops, Hainan University, 570228, Haikou, P. R. China
| | - Jinhui Chen
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, 572025, Sanya, P. R. China. .,Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education/Engineering Research Center of Rare and Precious Tree Species in Hainan Province, School of Forestry, Hainan University, 570228, Haikou, P. R. China.
| | - Jian Wang
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, 572025, Sanya, P. R. China. .,School of Horticulture, Hainan University, 570228, Haikou, P. R. China.
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7
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Yanagisawa H, Matsushita Y. Effect of potato spindle tuber viroid variants and infection stage on seed transmission through pollen. Lett Appl Microbiol 2022; 75:836-843. [DOI: 10.1111/lam.13756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 04/22/2022] [Accepted: 05/27/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Hironobu Yanagisawa
- Central Region Agricultural Research Center, National Agriculture and Food Research Organization (NARO), Tsukuba Ibaraki 305‐8666 Japan
- Narita Branch, Yokohama Plant Protection Station, Aza‐Tennamino, Komaino, Narita Chiba 282‐0021 Japan
| | - Yosuke Matsushita
- Institute of Plant Protection National Agriculture and Food Research Organization (NARO), Tsukuba Ibaraki 305‐8519 Japan
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8
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Xie DL, Zheng XL, Zhou CY, Kanwar MK, Zhou J. Functions of Redox Signaling in Pollen Development and Stress Response. Antioxidants (Basel) 2022; 11:antiox11020287. [PMID: 35204170 PMCID: PMC8868224 DOI: 10.3390/antiox11020287] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/28/2022] [Accepted: 01/29/2022] [Indexed: 02/01/2023] Open
Abstract
Cellular redox homeostasis is crucial for normal plant growth and development. Each developmental stage of plants has a specific redox mode and is maintained by various environmental cues, oxidants, and antioxidants. Reactive oxygen species (ROS) and reactive nitrogen species are the chief oxidants in plant cells and participate in cell signal transduction and redox balance. The production and removal of oxidants are in a dynamic balance, which is necessary for plant growth. Especially during reproductive development, pollen development depends on ROS-mediated tapetal programmed cell death to provide nutrients and other essential substances. The deviation of the redox state in any period will lead to microspore abortion and pollen sterility. Meanwhile, pollens are highly sensitive to environmental stress, in particular to cell oxidative burst due to its peculiar structure and function. In this regard, plants have evolved a series of complex mechanisms to deal with redox imbalance and oxidative stress damage. This review summarizes the functions of the main redox components in different stages of pollen development, and highlights various redox protection mechanisms of pollen in response to environmental stimuli. In continuation, we also discuss the potential applications of plant growth regulators and antioxidants for improving pollen vigor and fertility in sustaining better agriculture practices.
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Affiliation(s)
- Dong-Ling Xie
- Department of Horticulture, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China; (D.-L.X.); (X.-L.Z.); (C.-Y.Z.); (M.K.K.)
| | - Xue-Lian Zheng
- Department of Horticulture, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China; (D.-L.X.); (X.-L.Z.); (C.-Y.Z.); (M.K.K.)
| | - Can-Yu Zhou
- Department of Horticulture, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China; (D.-L.X.); (X.-L.Z.); (C.-Y.Z.); (M.K.K.)
| | - Mukesh Kumar Kanwar
- Department of Horticulture, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China; (D.-L.X.); (X.-L.Z.); (C.-Y.Z.); (M.K.K.)
| | - Jie Zhou
- Department of Horticulture, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China; (D.-L.X.); (X.-L.Z.); (C.-Y.Z.); (M.K.K.)
- Key Laboratory of Horticultural Plants Growth, Development and Quality Improvement, Agricultural Ministry of China, Yuhangtang Road 866, Hangzhou 310058, China
- Shandong (Linyi) Institute of Modern Agriculture, Zhejiang University, Linyi 276000, China
- Correspondence:
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9
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Yang Y, Xiang Y, Niu Y. An Overview of the Molecular Mechanisms and Functions of Autophagic Pathways in Plants. PLANT SIGNALING & BEHAVIOR 2021; 16:1977527. [PMID: 34617497 PMCID: PMC9208794 DOI: 10.1080/15592324.2021.1977527] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/29/2021] [Accepted: 08/31/2021] [Indexed: 06/13/2023]
Abstract
Autophagy is an evolutionarily conserved pathway for the degradation of damaged or toxic components. Under normal conditions, autophagy maintains cellular homeostasis. It can be triggered by senescence and various stresses. In the process of autophagy, autophagy-related (ATG) proteins not only function as central signal regulators but also participate in the development of complex survival mechanisms when plants suffer from adverse environments. Therefore, ATGs play significant roles in metabolism, development and stress tolerance. In the past decade, both the molecular mechanisms of autophagy and a large number of components involved in the assembly of autophagic vesicles have been identified. In recent studies, an increasing number of components, mechanisms, and receptors have appeared in the autophagy pathway. In this paper, we mainly review the recent progress of research on the molecular mechanisms of plant autophagy, as well as its function under biotic stress and abiotic stress.
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Affiliation(s)
- Yang Yang
- Moe Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences,Lanzhou University, Lanzhou, China
| | - Yun Xiang
- Moe Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences,Lanzhou University, Lanzhou, China
| | - Yue Niu
- Moe Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences,Lanzhou University, Lanzhou, China
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10
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Rehman NU, Zeng P, Mo Z, Guo S, Liu Y, Huang Y, Xie Q. Conserved and Diversified Mechanism of Autophagy between Plants and Animals upon Various Stresses. Antioxidants (Basel) 2021; 10:1736. [PMID: 34829607 PMCID: PMC8615172 DOI: 10.3390/antiox10111736] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 10/27/2021] [Accepted: 10/27/2021] [Indexed: 01/01/2023] Open
Abstract
Autophagy is a highly conserved degradation mechanism in eukaryotes, executing the breakdown of unwanted cell components and subsequent recycling of cellular material for stress relief through vacuole-dependence in plants and yeast while it is lysosome-dependent in animal manner. Upon stress, different types of autophagy are stimulated to operate certain biological processes by employing specific selective autophagy receptors (SARs), which hijack the cargo proteins or organelles to the autophagy machinery for subsequent destruction in the vacuole/lysosome. Despite recent advances in autophagy, the conserved and diversified mechanism of autophagy in response to various stresses between plants and animals still remain a mystery. In this review, we intend to summarize and discuss the characterization of the SARs and their corresponding processes, expectantly advancing the scope and perspective of the evolutionary fate of autophagy between plants and animals.
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Affiliation(s)
- Naveed Ur Rehman
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China; (N.U.R.); (P.Z.); (Z.M.); (S.G.)
| | - Peichun Zeng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China; (N.U.R.); (P.Z.); (Z.M.); (S.G.)
| | - Zulong Mo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China; (N.U.R.); (P.Z.); (Z.M.); (S.G.)
| | - Shaoying Guo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China; (N.U.R.); (P.Z.); (Z.M.); (S.G.)
| | - Yunfeng Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Sciences and Technology, Guangxi University, Nanning 530004, China;
| | - Yifeng Huang
- Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Science, Hangzhou 310001, China
| | - Qingjun Xie
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China; (N.U.R.); (P.Z.); (Z.M.); (S.G.)
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11
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Kiyono H, Katano K, Suzuki N. Links between Regulatory Systems of ROS and Carbohydrates in Reproductive Development. PLANTS 2021; 10:plants10081652. [PMID: 34451697 PMCID: PMC8401158 DOI: 10.3390/plants10081652] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 08/03/2021] [Accepted: 08/09/2021] [Indexed: 12/02/2022]
Abstract
To thrive on the earth, highly sophisticated systems to finely control reproductive development have been evolved in plants. In addition, deciphering the mechanisms underlying the reproductive development has been considered as a main research avenue because it leads to the improvement of the crop yields to fulfill the huge demand of foods for the growing world population. Numerous studies revealed the significance of ROS regulatory systems and carbohydrate transports and metabolisms in the regulation of various processes of reproductive development. However, it is poorly understood how these mechanisms function together in reproductive tissues. In this review, we discuss mode of coordination and integration between ROS regulatory systems and carbohydrate transports and metabolisms underlying reproductive development based on the hitherto findings. We then propose three mechanisms as key players that integrate ROS and carbohydrate regulatory systems. These include ROS-dependent programmed cell death (PCD), mitochondrial and respiratory metabolisms as sources of ROS and energy, and functions of arabinogalactan proteins (AGPs). It is likely that these key mechanisms govern the various signals involved in the sequential events required for proper seed production.
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Affiliation(s)
- Hanako Kiyono
- Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioi-cho, Chiyoda, Tokyo 102-8554, Japan; (H.K.); (K.K.)
| | - Kazuma Katano
- Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioi-cho, Chiyoda, Tokyo 102-8554, Japan; (H.K.); (K.K.)
- Research Fellow of Japan Society for the Promotion of Science, Chiyoda, Tokyo 102-0083, Japan
| | - Nobuhiro Suzuki
- Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioi-cho, Chiyoda, Tokyo 102-8554, Japan; (H.K.); (K.K.)
- Correspondence: ; Tel.: +81-3-3238-3884
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12
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Wojciechowska N, Michalak KM, Bagniewska-Zadworna A. Autophagy-an underestimated coordinator of construction and destruction during plant root ontogeny. PLANTA 2021; 254:15. [PMID: 34184131 PMCID: PMC8238727 DOI: 10.1007/s00425-021-03668-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 06/20/2021] [Indexed: 05/13/2023]
Abstract
MAIN CONCLUSION Autophagy is a key but undervalued process in root ontogeny, ensuring both the proper development of root tissues as well as the senescence of the entire organ. Autophagy is a process which occurs during plant adaptation to changing environmental conditions as well as during plant ontogeny. Autophagy is also engaged in plant root development, however, the limitations of belowground studies make it challenging to understand the entirety of the developmental processes. We summarize and discuss the current data pertaining to autophagy in the roots of higher plants during their formation and degradation, from the beginning of root tissue differentiation and maturation; all the way to the aging of the entire organ. During root growth, autophagy participates in the processes of central vacuole formation in cortical tissue development, as well as vascular tissue differentiation and root senescence. At present, several key issues are still not entirely understood and remain to be addressed in future studies. The major challenge lies in the portrayal of the mechanisms of autophagy on subcellular events in belowground plant organs during the programmed control of cellular degradation pathways in roots. Given the wide range of technical areas of inquiry where root-related research can be applied, including cutting-edge cell biological methods to track, sort and screen cells from different root tissues and zones of growth, the identification of several lines of evidence pertaining to autophagy during root developmental processes is the most urgent challenge. Consequently, a substantial effort must be made to ensure whether the analyzed process is autophagy-dependent or not.
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Affiliation(s)
- Natalia Wojciechowska
- Department of General Botany, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland.
| | - Kornel M Michalak
- Department of General Botany, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland
| | - Agnieszka Bagniewska-Zadworna
- Department of General Botany, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland
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13
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Luo S, Li X, Zhang Y, Fu Y, Fan B, Zhu C, Chen Z. Cargo Recognition and Function of Selective Autophagy Receptors in Plants. Int J Mol Sci 2021; 22:ijms22031013. [PMID: 33498336 PMCID: PMC7864022 DOI: 10.3390/ijms22031013] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/18/2021] [Accepted: 01/18/2021] [Indexed: 12/16/2022] Open
Abstract
Autophagy is a major quality control system for degradation of unwanted or damaged cytoplasmic components to promote cellular homeostasis. Although non-selective bulk degradation of cytoplasm by autophagy plays a role during cellular response to nutrient deprivation, the broad roles of autophagy are primarily mediated by selective clearance of specifically targeted components. Selective autophagy relies on cargo receptors that recognize targeted components and recruit them to autophagosomes through interaction with lapidated autophagy-related protein 8 (ATG8) family proteins anchored in the membrane of the forming autophagosomes. In mammals and yeast, a large collection of selective autophagy receptors have been identified that mediate the selective autophagic degradation of organelles, aggregation-prone misfolded proteins and other unwanted or nonnative proteins. A substantial number of selective autophagy receptors have also been identified and functionally characterized in plants. Some of the autophagy receptors in plants are evolutionarily conserved with homologs in other types of organisms, while a majority of them are plant-specific or plant species-specific. Plant selective autophagy receptors mediate autophagic degradation of not only misfolded, nonactive and otherwise unwanted cellular components but also regulatory and signaling factors and play critical roles in plant responses to a broad spectrum of biotic and abiotic stresses. In this review, we summarize the research on selective autophagy in plants, with an emphasis on the cargo recognition and the biological functions of plant selective autophagy receptors.
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Affiliation(s)
- Shuwei Luo
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China; (S.L.); (X.L.); (Y.F.)
| | - Xifeng Li
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China; (S.L.); (X.L.); (Y.F.)
| | - Yan Zhang
- Department of Landscape and Horticulture, Ecology College, Lishui University, Lishui 323000, China;
- Department of Botany and Plant Pathology, Purdue Center for Plant Biology, Purdue University, West Lafayette, IN 47907-2054, USA;
| | - Yunting Fu
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China; (S.L.); (X.L.); (Y.F.)
| | - Baofang Fan
- Department of Botany and Plant Pathology, Purdue Center for Plant Biology, Purdue University, West Lafayette, IN 47907-2054, USA;
| | - Cheng Zhu
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China; (S.L.); (X.L.); (Y.F.)
- Correspondence: (C.Z.); (Z.C.); Tel.: +86-571-8683-6090 (C.Z.); +1-765-494-4657 (Z.C.)
| | - Zhixiang Chen
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China; (S.L.); (X.L.); (Y.F.)
- Department of Botany and Plant Pathology, Purdue Center for Plant Biology, Purdue University, West Lafayette, IN 47907-2054, USA;
- Correspondence: (C.Z.); (Z.C.); Tel.: +86-571-8683-6090 (C.Z.); +1-765-494-4657 (Z.C.)
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14
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Thanthrige N, Bhowmik SD, Ferguson BJ, Kabbage M, Mundree SG, Williams B. Potential Biotechnological Applications of Autophagy for Agriculture. FRONTIERS IN PLANT SCIENCE 2021; 12:760407. [PMID: 34777441 PMCID: PMC8579036 DOI: 10.3389/fpls.2021.760407] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 09/29/2021] [Indexed: 05/02/2023]
Abstract
Autophagy is a genetically regulated, eukaryotic cellular degradation system that sequestrates cytoplasmic materials in specialised vesicles, termed autophagosomes, for delivery and breakdown in the lysosome or vacuole. In plants, autophagy plays essential roles in development (e.g., senescence) and responses to abiotic (e.g., nutrient starvation, drought and oxidative stress) and biotic stresses (e.g., hypersensitive response). Initially, autophagy was considered a non-selective bulk degradation mechanism that provides energy and building blocks for homeostatic balance during stress. Recent studies, however, reveal that autophagy may be more subtle and selectively target ubiquitylated protein aggregates, protein complexes and even organelles for degradation to regulate vital cellular processes even during favourable conditions. The selective nature of autophagy lends itself to potential manipulation and exploitation as part of designer protein turnover machinery for the development of stress-tolerant and disease-resistant crops, crops with increased yield potential and agricultural efficiency and reduced post-harvest losses. Here, we discuss our current understanding of autophagy and speculate its potential manipulation for improved agricultural performance.
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Affiliation(s)
- Nipuni Thanthrige
- Centre for Agriculture and the Bioeconomy, Queensland University of Technology, Brisbane, QLD, Australia
| | - Sudipta Das Bhowmik
- Centre for Agriculture and the Bioeconomy, Queensland University of Technology, Brisbane, QLD, Australia
| | - Brett J. Ferguson
- School of Agriculture and Food Sciences, University of Queensland, Brisbane, QLD, Australia
| | - Mehdi Kabbage
- Department of Plant Pathology, University of Wisconsin-Madison, Madison, WI, United States
| | - Sagadevan G. Mundree
- Centre for Agriculture and the Bioeconomy, Queensland University of Technology, Brisbane, QLD, Australia
| | - Brett Williams
- Centre for Agriculture and the Bioeconomy, Queensland University of Technology, Brisbane, QLD, Australia
- *Correspondence: Brett Williams,
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15
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Akita K, Takagi T, Kobayashi K, Kuchitsu K, Kuroiwa T, Nagata N. Ultrastructural characterization of microlipophagy induced by the interaction of vacuoles and lipid bodies around generative and sperm cells in Arabidopsis pollen. PROTOPLASMA 2021; 258:129-138. [PMID: 32968871 PMCID: PMC7782417 DOI: 10.1007/s00709-020-01557-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 09/08/2020] [Indexed: 05/14/2023]
Abstract
During pollen maturation, various organelles change their distribution and function during development as male gametophytes. We analyzed the behavior of lipid bodies and vacuoles involved in lipophagy in Arabidopsis pollen using serial section SEM and conventional TEM. At the bicellular pollen stage, lipid bodies in the vegetative cells lined up at the surface of the generative cell. Vacuoles then tightly attached, drew in, and degraded the lipid bodies and eventually occupied the space of the lipid bodies. Degradation of lipid began before transfer of the entire contents of the lipid body. At the tricellular stage, vacuoles instead of lipid bodies surrounded the sperm cells. The degradation of lipid bodies is morphologically considered microautophagy. The atg2-1 Arabidopsis mutant is deficient in one autophagy-related gene (ATG). In this mutant, the assembly of vacuoles around sperm cells was sparser than that in wild-type pollen. The deficiency of ATG2 likely prevents or slows lipid degradation, although it does not prevent contact between organelles. These results demonstrate the involvement of microlipophagy in the pollen development of Arabidopsis.
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Affiliation(s)
- Kae Akita
- Department of Chemical Biological Sciences, Faculty of Science, Japan Women's University, Bunkyo-ku, Tokyo, Japan
| | - Tomoko Takagi
- Department of Chemical Biological Sciences, Faculty of Science, Japan Women's University, Bunkyo-ku, Tokyo, Japan
| | - Keiko Kobayashi
- Department of Chemical Biological Sciences, Faculty of Science, Japan Women's University, Bunkyo-ku, Tokyo, Japan
| | - Kazuyuki Kuchitsu
- Department of Applied Biological Science, Tokyo University of Science, Noda, Chiba, Japan
| | - Tsuneyoshi Kuroiwa
- Department of Chemical Biological Sciences, Faculty of Science, Japan Women's University, Bunkyo-ku, Tokyo, Japan
| | - Noriko Nagata
- Department of Chemical Biological Sciences, Faculty of Science, Japan Women's University, Bunkyo-ku, Tokyo, Japan.
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16
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Hanamata S, Kurusu T, Kuchitsu K. Cell Cycle-Dependence of Autophagic Activity and Inhibition of Autophagosome Formation at M Phase in Tobacco BY-2 Cells. Int J Mol Sci 2020; 21:E9166. [PMID: 33271936 PMCID: PMC7730373 DOI: 10.3390/ijms21239166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 11/28/2020] [Accepted: 11/29/2020] [Indexed: 11/29/2022] Open
Abstract
Autophagy is ubiquitous in eukaryotic cells and plays an essential role in stress adaptation and development by recycling nutrients and maintaining cellular homeostasis. However, the dynamics and regulatory mechanisms of autophagosome formation during the cell cycle in plant cells remain poorly elucidated. We here analyzed the number of autophagosomes during cell cycle progression in synchronized tobacco BY-2 cells expressing YFP-NtATG8a as a marker for the autophagosomes. Autophagosomes were abundant in the G2 and G1 phases of interphase, though they were much less abundant in the M and S phases. Autophagosomes drastically decreased during the G2/M transition, and the CDK inhibitor roscovitine inhibited the G2/M transition and the decrease in autophagosomes. Autophagosomes were rapidly increased by a proteasome inhibitor, MG-132. MG-132-induced autophagosome formation was also markedly lower in the M phases than during interphase. These results indicate that the activity of autophagosome formation is differently regulated at each cell cycle stage, which is strongly suppressed during mitosis.
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Affiliation(s)
- Shigeru Hanamata
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan;
- Graduate School of Science and Technology, Niigata University, 2-8050 Ikarashi, Niigata, Nishi-ku 950-2181, Japan
| | - Takamitsu Kurusu
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan;
- Department of Mechanical and Electrical Engineering, Suwa University of Science, 5000-1 Toyohira, Chino, Nagano 391-0292, Japan
| | - Kazuyuki Kuchitsu
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan;
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17
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Broad and Complex Roles of NBR1-Mediated Selective Autophagy in Plant Stress Responses. Cells 2020; 9:cells9122562. [PMID: 33266087 PMCID: PMC7760648 DOI: 10.3390/cells9122562] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 11/27/2020] [Accepted: 11/27/2020] [Indexed: 02/07/2023] Open
Abstract
Selective autophagy is a highly regulated degradation pathway for the removal of specific damaged or unwanted cellular components and organelles such as protein aggregates. Cargo selectivity in selective autophagy relies on the action of cargo receptors and adaptors. In mammalian cells, two structurally related proteins p62 and NBR1 act as cargo receptors for selective autophagy of ubiquitinated proteins including aggregation-prone proteins in aggrephagy. Plant NBR1 is the structural and functional homolog of mammalian p62 and NBR1. Since its first reports almost ten years ago, plant NBR1 has been well established to function as a cargo receptor for selective autophagy of stress-induced protein aggregates and play an important role in plant responses to a broad spectrum of stress conditions including heat, salt and drought. Over the past several years, important progress has been made in the discovery of specific cargo proteins of plant NBR1 and their roles in the regulation of plant heat stress memory, plant-viral interaction and special protein secretion. There is also new evidence for a possible role of NBR1 in stress-induced pexophagy, sulfur nutrient responses and abscisic acid signaling. In this review, we summarize these progresses and discuss the potential significance of NBR1-mediated selective autophagy in broad plant responses to both biotic and abiotic stresses.
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18
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Zhu L, Chen Z, Li H, Sun Y, Wang L, Zeng H, He Y. Lipid metabolism is involved in male fertility regulation of the photoperiod- and thermo sensitive genic male sterile rice line Peiai 64S. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 299:110581. [PMID: 32900435 DOI: 10.1016/j.plantsci.2020.110581] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 06/03/2020] [Accepted: 06/23/2020] [Indexed: 05/28/2023]
Abstract
Peiai 64S (PA64S) is a photoperiod- and thermo sensitive genic male sterile (PTGMS) rice line that has been widely applied in two-line hybrid rice breeding. The male fertility mechanism of PTGMS has always been the research focus. We obtained fertile PA64S (F) and sterile fertile PA64S (S) plants at 21℃ and 28℃, respectively. Here, we analyzed the development of anthers and pollen grains of PA64S (S) and found that the degradation of tapetum and sporopollenin accumulation of pollen exine was abnormal. The content of lipid components in PA64S (F) and PA64S (S) were different by LC-MS, among which sterols, (O-acyl) ω-hydroxy fatty acids, ceramide, and other lipid components were upregulated in PA64S (F). The results of transcriptome showed that many significantly different genes were enriched in the lipid metabolism pathways. Additionally, lipid synthesis and transport genes were downregulated in PA64S (S). In summary, the differences of the PA64S fertility under different temperatures were analyzed through multi-levels comparison. These results suggest that lipid synthesis and transport during PA64S anther development affects the lipid accumulation of pollen exine, and ultimately affected fertility. The differences in lipids content may also be a factor affecting PA64S pollen fertility.
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Affiliation(s)
- Lan Zhu
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei Province, 430070, China.
| | - Zhen Chen
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei Province, 430070, China.
| | - Haixia Li
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei Province, 430070, China.
| | - Yujun Sun
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei Province, 430070, China.
| | - Lei Wang
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei Province, 430070, China.
| | - Hanlai Zeng
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei Province, 430070, China.
| | - Ying He
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei Province, 430070, China.
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19
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Li S, Yan H, Mei WM, Tse YC, Wang H. Boosting autophagy in sexual reproduction: a plant perspective. THE NEW PHYTOLOGIST 2020; 226:679-689. [PMID: 31917864 DOI: 10.1111/nph.16414] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 12/21/2019] [Indexed: 06/10/2023]
Abstract
The key process of sexual reproduction is the successful fusion of the sperm and egg cell. Distinct from dynamic and flagellated animal sperm cells, higher flowering plant sperm cells are immotile. Therefore, plants have evolved a novel reproductive system to achieve fertilization and generate progenies. Plant sexual reproduction consists of multiple steps, mainly including gametophyte development, pollen-pistil recognition, pollen germination, double fertilization and postfertilization. During reproduction, active production, consumption and recycling of cellular components and energy are critically required to achieve fertilization. However, the underlying machinery of cellular degradation and turnover remains largely unexplored. Autophagy, the major catabolic pathway in eukaryotic cells, participates in regulating multiple aspects of plant activities, including abiotic and biotic stress resistance, pathogen response, senescence, nutrient remobilization and plant development. Nevertheless, a key unanswered question is how autophagy regulates plant fertilization and reproduction. Here, we focus on comparing and contrasting autophagy in several key reproductive processes of plant and animal systems to feature important distinctions and highlight future research directions of autophagy in angiosperm reproduction. We further discuss the potential crosstalk between autophagy and programmed cell death, which are often considered as two disconnected events in plant sexual reproduction.
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Affiliation(s)
- Shanshan Li
- College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - He Yan
- College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Wei-Ming Mei
- Outpatient Department of Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yu Chung Tse
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment and Department of Biology, Southern University of Science and Technology, Shenzhen, 518005, China
| | - Hao Wang
- College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
- Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China
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20
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Stefaniak S, Wojtyla Ł, Pietrowska-Borek M, Borek S. Completing Autophagy: Formation and Degradation of the Autophagic Body and Metabolite Salvage in Plants. Int J Mol Sci 2020; 21:E2205. [PMID: 32210003 PMCID: PMC7139740 DOI: 10.3390/ijms21062205] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/18/2020] [Accepted: 03/20/2020] [Indexed: 12/12/2022] Open
Abstract
Autophagy is an evolutionarily conserved process that occurs in yeast, plants, and animals. Despite many years of research, some aspects of autophagy are still not fully explained. This mostly concerns the final stages of autophagy, which have not received as much interest from the scientific community as the initial stages of this process. The final stages of autophagy that we take into consideration in this review include the formation and degradation of the autophagic bodies as well as the efflux of metabolites from the vacuole to the cytoplasm. The autophagic bodies are formed through the fusion of an autophagosome and vacuole during macroautophagy and by vacuolar membrane invagination or protrusion during microautophagy. Then they are rapidly degraded by vacuolar lytic enzymes, and products of the degradation are reused. In this paper, we summarize the available information on the trafficking of the autophagosome towards the vacuole, the fusion of the autophagosome with the vacuole, the formation and decomposition of autophagic bodies inside the vacuole, and the efflux of metabolites to the cytoplasm. Special attention is given to the formation and degradation of autophagic bodies and metabolite salvage in plant cells.
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Affiliation(s)
- Szymon Stefaniak
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University Poznań, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland; (S.S.); (Ł.W.)
| | - Łukasz Wojtyla
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University Poznań, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland; (S.S.); (Ł.W.)
| | - Małgorzata Pietrowska-Borek
- Department of Biochemistry and Biotechnology, Faculty of Agronomy and Bioengineering, Poznań University of Life Sciences, Dojazd 11, 60-632 Poznań, Poland;
| | - Sławomir Borek
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University Poznań, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland; (S.S.); (Ł.W.)
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21
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Su T, Li X, Yang M, Shao Q, Zhao Y, Ma C, Wang P. Autophagy: An Intracellular Degradation Pathway Regulating Plant Survival and Stress Response. FRONTIERS IN PLANT SCIENCE 2020; 11:164. [PMID: 32184795 PMCID: PMC7058704 DOI: 10.3389/fpls.2020.00164] [Citation(s) in RCA: 98] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 02/03/2020] [Indexed: 05/18/2023]
Abstract
Autophagy is an intracellular process that facilitates the bulk degradation of cytoplasmic materials by the vacuole or lysosome in eukaryotes. This conserved process is achieved through the coordination of different autophagy-related genes (ATGs). Autophagy is essential for recycling cytoplasmic material and eliminating damaged or dysfunctional cell constituents, such as proteins, aggregates or even entire organelles. Plant autophagy is necessary for maintaining cellular homeostasis under normal conditions and is upregulated during abiotic and biotic stress to prolong cell life. In this review, we present recent advances on our understanding of the molecular mechanisms of autophagy in plants and how autophagy contributes to plant development and plants' adaptation to the environment.
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Affiliation(s)
| | | | | | | | | | - Changle Ma
- *Correspondence: Changle Ma, ; Pingping Wang,
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22
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Norizuki T, Minamino N, Ueda T. Role of Autophagy in Male Reproductive Processes in Land Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:756. [PMID: 32625219 PMCID: PMC7311755 DOI: 10.3389/fpls.2020.00756] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 05/12/2020] [Indexed: 05/02/2023]
Abstract
Autophagy is a highly conserved system for degrading and recycling cytoplasmic components. The identification of autophagy-related (ATG) genes, required for autophagosome formation, has led to numerous studies using atg mutants. These studies have revealed the physiological significance of autophagy in various functions of diverse organisms. In land plants, autophagy is required for higher-order functions such as stress responses and development. Although defective autophagy does not result in any marked defect in the reproductive processes of Arabidopsis thaliana under laboratory conditions, several studies have shown that autophagy plays a pivotal role in male reproduction in several land plants. In this review, we aim to summarize information on the role of autophagy in male reproductive processes in land plants.
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Affiliation(s)
- Takuya Norizuki
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
- Division of Cellular Dynamics, National Institute for Basic Biology, Okazaki, Japan
| | - Naoki Minamino
- Division of Cellular Dynamics, National Institute for Basic Biology, Okazaki, Japan
| | - Takashi Ueda
- Division of Cellular Dynamics, National Institute for Basic Biology, Okazaki, Japan
- The Department of Basic Biology, SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Japan
- *Correspondence: Takashi Ueda,
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Hanamata S, Sawada J, Ono S, Ogawa K, Fukunaga T, Nonomura K, Kimura S, Kurusu T, Kuchitsu K. Impact of Autophagy on Gene Expression and Tapetal Programmed Cell Death During Pollen Development in Rice. FRONTIERS IN PLANT SCIENCE 2020; 11:172. [PMID: 32210988 PMCID: PMC7068715 DOI: 10.3389/fpls.2020.00172] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 02/05/2020] [Indexed: 05/21/2023]
Abstract
Autophagy has recently been shown to be required for tapetal programmed cell death (PCD) and pollen maturation in rice. A transcriptional regulatory network is also known to play a key role in the progression of tapetal PCD. However, the relationship between the gene regulatory network and autophagy in rice anther development is mostly unknown. Here, we comprehensively analyzed the effect of autophagy disruption on gene expression profile during the tapetal PCD in rice anther development using high-throughput RNA sequencing. Expression of thousands of genes, including specific transcription factors and several proteases required for tapetal degradation, fluctuated synchronously at specific stages during tapetal PCD progression in the wild-type anthers, while this fluctuation showed significant delay in the autophagy-deficient mutant Osatg7-1. Moreover, gene ontology enrichment analysis in combination with self-organizing map clustering as well as pathway analysis revealed that the expression patterns of a variety of organelle-related genes as well as genes involved in carbohydrate/lipid metabolism were affected in the Osatg7-1 mutant during pollen maturation. These results suggest that autophagy is required for proper regulation of gene expression and quality control of organelles and timely progression of tapetal PCD during rice pollen development.
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Affiliation(s)
- Shigeru Hanamata
- Department of Applied Biological Science, Tokyo University of Science, Noda, Japan
- Imaging Frontier Center, Tokyo University of Science, Noda, Japan
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
| | - Jumpei Sawada
- Department of Applied Biological Science, Tokyo University of Science, Noda, Japan
| | - Seijiro Ono
- Plant Cytogenetics Laboratory, National Institute of Genetics, Mishima, Japan
| | - Kazunori Ogawa
- Department of Applied Biological Science, Tokyo University of Science, Noda, Japan
| | - Togo Fukunaga
- Department of Applied Biological Science, Tokyo University of Science, Noda, Japan
| | - Ken–Ichi Nonomura
- Plant Cytogenetics Laboratory, National Institute of Genetics, Mishima, Japan
| | - Seisuke Kimura
- Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
- Center for Ecological Evolutionary Developmental Biology, Kyoto Sangyo University, Kyoto, Japan
| | - Takamitsu Kurusu
- Imaging Frontier Center, Tokyo University of Science, Noda, Japan
- Department of Mechanical and Electrical Engineering, Suwa University of Science, Chino, Japan
- *Correspondence: Takamitsu Kurusu, ; Kazuyuki Kuchitsu,
| | - Kazuyuki Kuchitsu
- Department of Applied Biological Science, Tokyo University of Science, Noda, Japan
- Imaging Frontier Center, Tokyo University of Science, Noda, Japan
- *Correspondence: Takamitsu Kurusu, ; Kazuyuki Kuchitsu,
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Essential roles of autophagy in metabolic regulation in endosperm development during rice seed maturation. Sci Rep 2019; 9:18544. [PMID: 31811157 PMCID: PMC6898296 DOI: 10.1038/s41598-019-54361-1] [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: 02/14/2019] [Accepted: 11/12/2019] [Indexed: 12/12/2022] Open
Abstract
Autophagy plays crucial roles in the recycling of metabolites, and is involved in many developmental processes. Rice mutants defective in autophagy are male sterile due to immature pollens, indicating its critical role in pollen development. However, physiological roles of autophagy during seed maturation had remained unknown. We here found that seeds of the rice autophagy-deficient mutant Osatg7-1, that produces seeds at a very low frequency in paddy fields, are smaller and show chalky appearance and lower starch content in the endosperm at the mature stage under normal growth condition. We comprehensively analyzed the effects of disruption of autophagy on biochemical properties, proteome and seed quality, and found an abnormal activation of starch degradation pathways including accumulation of α-amylases in the endosperm during seed maturation in Osatg7-1. These results indicate critical involvement of autophagy in metabolic regulation in the endosperm of rice, and provide insights into novel autophagy-mediated regulation of starch metabolism during seed maturation.
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25
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Li B, Liu G, Wang Y, Wei Y, Shi H. Overexpression of Banana ATG8f Modulates Drought Stress Resistance in Arabidopsis. Biomolecules 2019; 9:biom9120814. [PMID: 31810306 PMCID: PMC6995610 DOI: 10.3390/biom9120814] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 11/28/2019] [Accepted: 11/28/2019] [Indexed: 12/13/2022] Open
Abstract
Autophagy is essential for plant growth, development, and stress resistance. However, the involvement of banana autophagy-related genes in drought stress response and the underlying mechanism remain elusive. In this study, we found that the transcripts of 10 banana ATG8s responded to drought stress in different ways, and MaATG8f with the highest transcript in response to drought stress among them was chosen for functional analysis. Overexpression of MaATG8f improved drought stress resistance in Arabidopsis, with lower malonaldehyde level and higher level of assimilation rate. On the one hand, overexpression of MaATG8f activated the activities of superoxide dismutase, catalase, and peroxidase under drought stress conditions, so as to regulate reactive oxygen species accumulation. On the other hand, MaATG8f-overexpressing lines exhibited higher endogenous abscisic acid (ABA) level and more sensitivity to abscisic acid. Notably, the autophagosomes as visualized by CaMV35S::GFP–MaATG8f was activated after ABA treatment. Taken together, overexpression of MaATG8f positively regulated plant drought stress resistance through modulating reactive oxygen species metabolism, abscisic acid biosynthesis, and autophagic activity.
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Affiliation(s)
- Bing Li
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou 570228, China; (B.L.); (G.L.)
| | - Guoyin Liu
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou 570228, China; (B.L.); (G.L.)
- College of Forestry, Hainan University, Haikou 570228, China;
| | - Yuqi Wang
- College of Forestry, Hainan University, Haikou 570228, China;
| | - Yunxie Wei
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou 570228, China; (B.L.); (G.L.)
- Correspondence: (Y.W.); (H.S.); Tel.: +86-898-6616-0721 (Y.W. & H.S.)
| | - Haitao Shi
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou 570228, China; (B.L.); (G.L.)
- Correspondence: (Y.W.); (H.S.); Tel.: +86-898-6616-0721 (Y.W. & H.S.)
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26
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Wojciechowska N, Smugarzewska I, Marzec-Schmidt K, Zarzyńska-Nowak A, Bagniewska-Zadworna A. Occurrence of autophagy during pioneer root and stem development in Populus trichocarpa. PLANTA 2019; 250:1789-1801. [PMID: 31451904 DOI: 10.1007/s00425-019-03265-5] [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: 04/17/2019] [Accepted: 08/19/2019] [Indexed: 05/26/2023]
Abstract
Autophagy is involved in developmentally programmed cell death and is identified during the early development of phloem, as well as xylem with a dual role, as both an inducer and executioner of cell death. The regulation of primary and secondary development of roots and stems is important for the establishment of root systems and for the overall survival of trees. The molecular and cellular basis of the autophagic processes, which are used at distinct moments during the growth of both organs, is crucial to understand the regulation of their development. To address this, we use Populus trichocarpa seedlings grown in a rhizotron system to examine the autophagy processes involved in root and stem development. To monitor the visual aspects of autophagy, transmission electron microscopy (TEM) and immunolocalization of AuTophaGy-related protein (ATG8) enabled observations of the phenomenon at a structural level. To gain further insight into the autophagy process at the protein and molecular level, we evaluated the expression of ATG gene transcripts and ATG protein levels. Alternations in the expression level of specific ATG genes and localization of ATG8 proteins were observed during the course of root or stem primary and secondary development. Specifically, ATG8 was present in the cells exhibiting autophagy, during the differentiation and early development of xylem and phloem tissues, including both xylary and extraxylary fibers. Ultrastructural observations revealed tonoplast invagination with the formation of autophagic-like bodies. Additionally, the accumulation of autophagosomes was identifiable during the differentiation of xylem in both organs, long before the commencement of cell death. Taken together, these results provide evidence in support of the dual role of autophagy in developmental PCD. A specific role of the controller of cell death, which is a committed step with the release of hydrolytic enzymes from the vacuole and final digestion of protoplast, from which there is no return once initiated, is only attributed to mega-autophagy.
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Affiliation(s)
- Natalia Wojciechowska
- Department of General Botany, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland
| | - Iga Smugarzewska
- Department of General Botany, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland
| | - Katarzyna Marzec-Schmidt
- Department of General Botany, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland
| | - Aleksandra Zarzyńska-Nowak
- Department of Virology and Bacteriology, Institute of Plant Protection-National Research Institute, Wł. Węgorka 20, 60-318, Poznań, Poland
| | - Agnieszka Bagniewska-Zadworna
- Department of General Botany, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland.
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27
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Dündar G, Shao Z, Higashitani N, Kikuta M, Izumi M, Higashitani A. Autophagy mitigates high-temperature injury in pollen development of Arabidopsis thaliana. Dev Biol 2019; 456:190-200. [DOI: 10.1016/j.ydbio.2019.08.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 07/31/2019] [Accepted: 08/27/2019] [Indexed: 01/26/2023]
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28
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Haddad IVN, de Sá-Haiad B, de Santiago-Fernandes LDR, Machado SR. Megagametophyte development and female sterility in Maytenus obtusifolia Mart. (Celastraceae). PROTOPLASMA 2019; 256:1667-1680. [PMID: 31286267 DOI: 10.1007/s00709-019-01413-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 07/03/2019] [Indexed: 06/09/2023]
Abstract
Reproduction in flowering plants is closely related to the megagametophyte, since the megagametophyte is involved in pollen tube reception and contains the two female gametes-egg cell and central cell. Previous conventional light microscopy methods have shown that female sterility in perfect flowers of Maytenus obtusifolia is associated with the occurrence of sterile ovules whose megagametophytes have hypertrophied synergids. Here, using transmission electron microscopy and cytochemical methods, we compare the megagametophytes in fertile and sterile ovules from perfect and pistillate flowers, and investigate the cellular events that result in the degradation of the megagametophyte cells from sterile ovules. In fertile ovules of perfect and pistillate flowers, mature megagametophytes have two synergids, egg cell and central cell. In fertile ovules, the synergids present an extensive rough endoplasmic reticulum (RER) profile, large populations of mitochondria, when compared to egg cells, vesicles, Golgi bodies, plastids and a nucleus with heterochromatin. Besides that, the egg cell has a small population of organelles and the central cell exhibits cytoplasm with free ribosomes, RER, vesicles originating from the RER, Golgi bodies and oil inclusions. In mature megagametophytes from sterile ovules of perfect and pistillate flowers, massive autophagy occurs by tonoplast rupture promoting hydrolase release, leading to protoplast and cell wall degradation-typical evidence of programmed cell death (PCD). Therefore, female sterility in the majority of M. obtusifolia sterile ovules is the result of PCD by massive autophagy in the megagametophyte cells. In a few other sterile ovules, sterility is due to the delayed or the absence of megagametophyte development.
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Affiliation(s)
| | - Bárbara de Sá-Haiad
- Departamento de Botânica, Museu Nacional, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 22940-040, Brazil
| | | | - Silvia Rodrigues Machado
- Departamento de Botânica, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, São Paulo, SP, 18618-000, Brazil
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29
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Borek S, Stefaniak S, Śliwiński J, Garnczarska M, Pietrowska-Borek M. Autophagic Machinery of Plant Peroxisomes. Int J Mol Sci 2019; 20:E4754. [PMID: 31557865 PMCID: PMC6802006 DOI: 10.3390/ijms20194754] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 09/22/2019] [Accepted: 09/23/2019] [Indexed: 12/28/2022] Open
Abstract
Peroxisomes are cell organelles that play an important role in plants in many physiological and developmental processes. The plant peroxisomes harbor enzymes of the β-oxidation of fatty acids and the glyoxylate cycle; photorespiration; detoxification of reactive oxygen and nitrogen species; as well as biosynthesis of hormones and signal molecules. The function of peroxisomes in plant cells changes during plant growth and development. They are transformed from organelles involved in storage lipid breakdown during seed germination and seedling growth into leaf peroxisomes involved in photorespiration in green parts of the plant. Additionally, intensive oxidative metabolism of peroxisomes causes damage to their components. Therefore, unnecessary or damaged peroxisomes are degraded by selective autophagy, called pexophagy. This is an important element of the quality control system of peroxisomes in plant cells. Despite the fact that the mechanism of pexophagy has already been described for yeasts and mammals, the molecular mechanisms by which plant cells recognize peroxisomes that will be degraded via pexophagy still remain unclear. It seems that a plant-specific mechanism exists for the selective degradation of peroxisomes. In this review, we describe the physiological role of pexophagy in plant cells and the current hypotheses concerning the mechanism of plant pexophagy.
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Affiliation(s)
- Sławomir Borek
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University Poznań, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland.
| | - Szymon Stefaniak
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University Poznań, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland.
| | - Jan Śliwiński
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University Poznań, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland.
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK.
| | - Małgorzata Garnczarska
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University Poznań, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland.
| | - Małgorzata Pietrowska-Borek
- Department of Biochemistry and Biotechnology, Faculty of Agronomy and Bioengineering, Poznań University of Life Sciences, Dojazd 11, 60-632 Poznań, Poland.
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30
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Wang P, Nolan TM, Yin Y, Bassham DC. Identification of transcription factors that regulate ATG8 expression and autophagy in Arabidopsis. Autophagy 2019; 16:123-139. [PMID: 30909785 DOI: 10.1080/15548627.2019.1598753] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Autophagy is a conserved catabolic process in eukaryotes that contributes to cell survival in response to multiple stresses and is important for organism fitness. In Arabidopsis thaliana, the core machinery of autophagy is well defined, but its transcriptional regulation is largely unknown. The ATG8 (autophagy-related 8) protein plays central roles in decorating autophagosomes and binding to specific cargo receptors to recruit cargo to autophagosomes. We propose that the transcriptional control of ATG8 genes is important during the formation of autophagosomes and therefore contributes to survival during stress. Here, we describe a yeast one-hybrid (Y1H) screen for transcription factors (TFs) that regulate ATG8 gene expression in Arabidopsis, using the promoters of 4 ATG8 genes. We identified a total of 225 TFs from 35 families that bind these promoters. The TF-ATG8 promoter interactions revealed a wide array of diverse TF families for different promoters, as well as enrichment for families of TFs that bound to specific fragments. These TFs are not only involved in plant developmental processes but also in the response to environmental stresses. TGA9 (TGACG (TGA) motif-binding protein 9)/AT1G08320 was confirmed as a positive regulator of autophagy. TGA9 overexpression activated autophagy under both control and stress conditions and transcriptionally up-regulated expression of ATG8B, ATG8E and additional ATG genes via binding to their promoters. Our results provide a comprehensive resource of TFs that regulate ATG8 gene expression and lay a foundation for understanding the transcriptional regulation of plant autophagy.Abbreviations: ABRC: Arabidopsis biological resource center; AP2-EREBP: APETALA2/Ethylene-responsive element binding protein; ARF: auxin response factor; ATF4: activating transcription factor 4; ATG: autophagy-related; ChIP: chromatin immunoprecipitation; DAP-seq: DNA affinity purification sequencing; FOXO: forkhead box O; GFP: green fluorescent protein; GO: gene ontologies; HB: homeobox; LD: long-day; LUC: firefly luciferase; MAP1LC3: microtubule associated protein 1 light chain 3; MDC: monodansylcadaverine; 3-MA: 3-methyladenine; OE: overexpressing; PCD: programmed cell death; qPCR: quantitative polymerase chain reaction; REN: renilla luciferase; RT: room temperature; SD: standard deviation; TF: transcription factor; TFEB: transcription factor EB; TGA: TGACG motif; TOR: target of rapamycin; TSS: transcription start site; WT: wild-type; Y1H: yeast one-hybrid.
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Affiliation(s)
- Ping Wang
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, USA.,State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Trevor M Nolan
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, USA
| | - Yanhai Yin
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, USA
| | - Diane C Bassham
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, USA
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31
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Hanamata S, Sawada J, Toh B, Ono S, Ogawa K, Fukunaga T, Nonomura KI, Kurusu T, Kuchitsu K. Monitoring autophagy in rice tapetal cells during pollen maturation. PLANT BIOTECHNOLOGY (TOKYO, JAPAN) 2019; 36:99-105. [PMID: 31768110 PMCID: PMC6847784 DOI: 10.5511/plantbiotechnology.19.0417a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 04/17/2019] [Indexed: 05/18/2023]
Abstract
We have previously shown that autophagy is required for post meiotic anther development including programmed cell death-mediated degradation of the tapetum and pollen maturation in rice. However, the spatiotemporal dynamics of autophagy in the tapetum remain poorly understood. We here established an in vivo imaging technique to analyze the dynamics of autophagy in rice tapetum cells by expressing green fluorescent protein-tagged AtATG8, a marker for autophagosomes. 3D-imaging analysis revealed that the number of autophagosomes/autophagy-related structures is extremely low at the tetrad stage (stage 8), and autophagy is dramatically induced at the uninucleate stages (stage 9-10) throughout the tapetal cells during anther development. The present monitoring system for autophagy offers a powerful tool to analyze the regulation of autophagy in rice tapetal cells during pollen maturation.
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Affiliation(s)
- Shigeru Hanamata
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
- Imaging Frontier Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
- Graduate School of Science and Technology, Niigata University, University, 2-8050 Ikarashi, Niigata 950-2181, Japan
| | - Jumpei Sawada
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Bunki Toh
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Seijiro Ono
- Plant Cytogenetics Laboratory, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
| | - Kazunori Ogawa
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Togo Fukunaga
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Ken-Ichi Nonomura
- Plant Cytogenetics Laboratory, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
| | - Takamitsu Kurusu
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
- Imaging Frontier Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
- Department of Mechanical and Electrical Engineering, Suwa University of Science, 5000-1 Toyohira, Chino, Nagano 391-0292, Japan
- E-mail: Tel: +81-266-73-9826 Fax: +81-266-73-1230
| | - Kazuyuki Kuchitsu
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
- Imaging Frontier Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
- E-mail: Tel: +81-4-7122-9404 Fax: +81-4-7123-9767
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Kajikawa M, Yamauchi M, Shinkawa H, Tanaka M, Hatano K, Nishimura Y, Kato M, Fukuzawa H. Isolation and Characterization of Chlamydomonas Autophagy-Related Mutants in Nutrient-Deficient Conditions. PLANT & CELL PHYSIOLOGY 2019; 60:126-138. [PMID: 30295899 DOI: 10.1093/pcp/pcy193] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 09/17/2018] [Indexed: 05/08/2023]
Abstract
Autophagy is a recycling system for amino acids and carbon- and nitrogen (N)-containing compounds. To date, the functional importance of autophagy in microalgae in nutrient-deficient conditions has not been evaluated by using autophagy-defective mutants. Here, we provide evidence which supports the following notions by characterizing an insertional mutant of the autophagy-related gene ATG8, encoding a ubiquitin-like protein necessary for the formation of the autophagosome in the green alga, Chlamydomonas reinhardtii. First, ATG8 is required for maintenance of cell survival and Chl content in N-, sulfur- and phosphate-deficient conditions. Secondly, ATG8 supports the degradation of triacylglycerol and lipid droplets after the resupply of N to cells cultured in N-limiting conditions. Thirdly, ATG8 is also necessary for accumulation of starch in phosphate-deficient conditions. Additionally, autophagy is not essential for maternal inheritance of the organelle genomes in gametogenesis.
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Affiliation(s)
| | - Marika Yamauchi
- Graduate School of Humanities and Sciences, Ochanomizu University, Tokyo, Japan
| | - Haruka Shinkawa
- Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Manabu Tanaka
- Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
| | - Kyoko Hatano
- Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
| | | | - Misako Kato
- Graduate School of Humanities and Sciences, Ochanomizu University, Tokyo, Japan
| | - Hideya Fukuzawa
- Graduate School of Biostudies, Kyoto University, Kyoto, Japan
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33
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Vertical and Horizontal Transmission of Pospiviroids. Viruses 2018; 10:v10120706. [PMID: 30545048 PMCID: PMC6315636 DOI: 10.3390/v10120706] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 12/03/2018] [Accepted: 12/05/2018] [Indexed: 12/14/2022] Open
Abstract
Viroids are highly structured, single-stranded, non-protein-coding circular RNA pathogens. Some viroids are vertically transmitted through both viroid-infected ovule and pollen. For example, potato spindle tuber viroid, a species that belongs to Pospiviroidae family, is delivered to the embryo through the ovule or pollen during the development of reproductive tissues before embryogenesis. In addition, some of Pospiviroidae are also horizontally transmitted by pollen. Tomato planta macho viroid in pollen infects to the ovary from pollen tube during pollen tube elongation and eventually causes systemic infection, resulting in the establishment of horizontal transmission. Furthermore, fertilization is not required to accomplish the horizontal transmission. In this review, we will overview the recent research progress in vertical and horizontal transmission of viroids, mainly by focusing on histopathological studies, and also discuss the impact of seed transmission on viroid dissemination and seed health.
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34
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Tang J, Bassham DC. Autophagy in crop plants: what's new beyond Arabidopsis? Open Biol 2018; 8:180162. [PMID: 30518637 PMCID: PMC6303781 DOI: 10.1098/rsob.180162] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 11/08/2018] [Indexed: 12/19/2022] Open
Abstract
Autophagy is a major degradation and recycling pathway in plants. It functions to maintain cellular homeostasis and is induced by environmental cues and developmental stimuli. Over the past decade, the study of autophagy has expanded from model plants to crop species. Many features of the core machinery and physiological functions of autophagy are conserved among diverse organisms. However, several novel functions and regulators of autophagy have been characterized in individual plant species. In light of its critical role in development and stress responses, a better understanding of autophagy in crop plants may eventually lead to beneficial agricultural applications. Here, we review recent progress on understanding autophagy in crops and discuss potential future research directions.
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Affiliation(s)
- Jie Tang
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA 50011, USA
| | - Diane C Bassham
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA 50011, USA
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de Oliveira AA, Pastina MM, de Souza VF, da Costa Parrella RA, Noda RW, Simeone MLF, Schaffert RE, de Magalhães JV, Damasceno CMB, Margarido GRA. Genomic prediction applied to high-biomass sorghum for bioenergy production. MOLECULAR BREEDING : NEW STRATEGIES IN PLANT IMPROVEMENT 2018; 38:49. [PMID: 29670457 PMCID: PMC5893689 DOI: 10.1007/s11032-018-0802-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 03/13/2018] [Indexed: 05/18/2023]
Abstract
The increasing cost of energy and finite oil and gas reserves have created a need to develop alternative fuels from renewable sources. Due to its abiotic stress tolerance and annual cultivation, high-biomass sorghum (Sorghum bicolor L. Moench) shows potential as a bioenergy crop. Genomic selection is a useful tool for accelerating genetic gains and could restructure plant breeding programs by enabling early selection and reducing breeding cycle duration. This work aimed at predicting breeding values via genomic selection models for 200 sorghum genotypes comprising landrace accessions and breeding lines from biomass and saccharine groups. These genotypes were divided into two sub-panels, according to breeding purpose. We evaluated the following phenotypic biomass traits: days to flowering, plant height, fresh and dry matter yield, and fiber, cellulose, hemicellulose, and lignin proportions. Genotyping by sequencing yielded more than 258,000 single-nucleotide polymorphism markers, which revealed population structure between subpanels. We then fitted and compared genomic selection models BayesA, BayesB, BayesCπ, BayesLasso, Bayes Ridge Regression and random regression best linear unbiased predictor. The resulting predictive abilities varied little between the different models, but substantially between traits. Different scenarios of prediction showed the potential of using genomic selection results between sub-panels and years, although the genotype by environment interaction negatively affected accuracies. Functional enrichment analyses performed with the marker-predicted effects suggested several interesting associations, with potential for revealing biological processes relevant to the studied quantitative traits. This work shows that genomic selection can be successfully applied in biomass sorghum breeding programs.
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Affiliation(s)
- Amanda Avelar de Oliveira
- Department of Genetics, Luiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba, SP 13418-900 Brazil
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Avin-Wittenberg T, Baluška F, Bozhkov PV, Elander PH, Fernie AR, Galili G, Hassan A, Hofius D, Isono E, Le Bars R, Masclaux-Daubresse C, Minina EA, Peled-Zehavi H, Coll NS, Sandalio LM, Satiat-Jeunemaitre B, Sirko A, Testillano PS, Batoko H. Autophagy-related approaches for improving nutrient use efficiency and crop yield protection. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:1335-1353. [PMID: 29474677 DOI: 10.1093/jxb/ery069] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 02/16/2018] [Indexed: 05/18/2023]
Abstract
Autophagy is a eukaryotic catabolic pathway essential for growth and development. In plants, it is activated in response to environmental cues or developmental stimuli. However, in contrast to other eukaryotic systems, we know relatively little regarding the molecular players involved in autophagy and the regulation of this complex pathway. In the framework of the COST (European Cooperation in Science and Technology) action TRANSAUTOPHAGY (2016-2020), we decided to review our current knowledge of autophagy responses in higher plants, with emphasis on knowledge gaps. We also assess here the potential of translating the acquired knowledge to improve crop plant growth and development in a context of growing social and environmental challenges for agriculture in the near future.
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Affiliation(s)
- Tamar Avin-Wittenberg
- Department of Plant and Environmental Sciences, Alexander Silberman Institute of Life Sciences, Hebrew University of Jerusalem, Givat Ram, Jerusalem, Israel
| | - Frantisek Baluška
- Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee, Bonn, Germany
| | - Peter V Bozhkov
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, Uppsala, Sweden
| | - Pernilla H Elander
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, Uppsala, Sweden
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg, Potsdam-Golm, Germany
| | - Gad Galili
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot Israel
| | - Ammar Hassan
- Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee, Bonn, Germany
| | - Daniel Hofius
- Department of Plant Biology, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center of Plant Biology, Uppsala, Sweden
| | - Erika Isono
- Department of Biology, University of Konstanz, Universitätsstrasse, Konstanz, Germany
| | - Romain Le Bars
- Cell Biology Pôle Imagerie-Gif, Institute of Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Céline Masclaux-Daubresse
- INRA-AgroParisTech, Institut Jean-Pierre Bourgin, UMR1318, ERL CNRS 3559, Saclay Plant Sciences, Versailles, France
| | - Elena A Minina
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, Uppsala, Sweden
| | - Hadas Peled-Zehavi
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot Israel
| | - Núria S Coll
- Centre for Research in Agricultural Genomics (CSIC-IRTA-UAB-UB), Bellaterra-Cerdanyola del Valles, Catalonia, Spain
| | - Luisa M Sandalio
- Departmento de Bioquímica, Biología Celular y Molecular de Plantas Experimental del Zaidín, CSIC, Granada, Spain
| | - Béatrice Satiat-Jeunemaitre
- Cell Biology Pôle Imagerie-Gif, Institute of Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Agnieszka Sirko
- Institute of Biochemistry and Biophysics Polish Academy of Sciences, ul. Pawinskiego, Warsaw, Poland
| | - Pilar S Testillano
- Pollen Biotechnology of Crop Plants group, Centro de Investigaciones Biológicas, Biological Research Centre (CIB), CSIC, Ramiro de Maeztu, Madrid, Spain
| | - Henri Batoko
- Université Catholique de Louvain, Institute of Life Sciences, Croix du Sud, Louvain-la-Neuve, Belgium
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Qi ZY, Wang KX, Yan MY, Kanwar MK, Li DY, Wijaya L, Alyemeni MN, Ahmad P, Zhou J. Melatonin Alleviates High Temperature-Induced Pollen Abortion in Solanum lycopersicum. Molecules 2018; 23:E386. [PMID: 29439470 PMCID: PMC6017144 DOI: 10.3390/molecules23020386] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 02/07/2018] [Accepted: 02/08/2018] [Indexed: 12/21/2022] Open
Abstract
Melatonin is a pleiotropic signal molecule that plays critical roles in regulating plant growth and development, as well as providing physiological protections against various environmental stresses. Nonetheless, the mechanisms for melatonin-mediated pollen thermotolerance remain largely unknown. In this study, we report that irrigation treatment with melatonin (20 µM) effectively ameliorated high temperature-induced inactivation of pollen and inhibition of pollen germination in tomato (Solanum lycopersicum) plants. Melatonin alleviated reactive oxygen species production in tomato anthers under high temperature by the up-regulation of the transcription and activities of several antioxidant enzymes. Transmission electron micrograph results showed that high temperature-induced pollen abortion is associated with a premature degeneration of the tapetum cells and the formation of defective pollen grains with degenerated nuclei at the early uninuclear microspore stage, whilst melatonin protected degradation of organelles by enhancing the expression of heat shock protein genes to refold unfolded proteins and the expression of autophagy-related genes and formation of autophagosomes to degrade denatured proteins. These findings suggest a novel function of melatonin to protect pollen activity under high temperature and support the potential effects of melatonin on reproductive development of plants.
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Affiliation(s)
- Zhen-Yu Qi
- Department of Horticulture/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou 310058, China.
- Agricultural Experiment Station, Zhejiang University, Hangzhou 310058, China.
| | - Kai-Xin Wang
- Department of Horticulture/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou 310058, China.
| | - Meng-Yu Yan
- Department of Horticulture/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou 310058, China.
| | - Mukesh Kumar Kanwar
- Department of Horticulture/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou 310058, China.
| | - Dao-Yi Li
- Chinese Academy of Agricultural Mechanization Sciences, Beijing 10083, China.
| | - Leonard Wijaya
- Department of Botany and Microbiology, Faculty of Science, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Mohammed Nasser Alyemeni
- Department of Botany and Microbiology, Faculty of Science, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Parvaiz Ahmad
- Department of Botany and Microbiology, Faculty of Science, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Jie Zhou
- Department of Horticulture/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou 310058, China.
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38
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Distribution of Tomato planta macho viroid in germinating pollen and transmitting tract. Virus Genes 2017; 54:124-129. [DOI: 10.1007/s11262-017-1510-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 09/19/2017] [Indexed: 10/18/2022]
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Kurusu T, Koyano T, Kitahata N, Kojima M, Hanamata S, Sakakibara H, Kuchitsu K. Autophagy-mediated regulation of phytohormone metabolism during rice anther development. PLANT SIGNALING & BEHAVIOR 2017; 12:e1365211. [PMID: 28873038 PMCID: PMC5640179 DOI: 10.1080/15592324.2017.1365211] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 08/04/2017] [Indexed: 05/18/2023]
Abstract
Autophagy has recently been shown to be required for postmeiotic anther development including anther dehiscence, programmed cell death-mediated degradation of the tapetum and pollen maturation in rice. Several phytohormones are known to play essential roles during male reproductive development including pollen maturation. However, the relationship between phytohormone metabolism and autophagy in plant reproductive development is unknown. We here comprehensively analyzed the effect of autophagy disruption on phytohormone contents in rice anthers at the flowering stage, and found that endogenous levels of active-forms of gibberellins (GAs) and cytokinin, trans-zeatin, were significantly lower in the autophagy-defective mutant, Osatg7-1, than in the wild type. Treatment with GA4 partially recovered maturation of the mutant pollens, but did not recover the limited anther dehiscence as well as sterility phenotype. These results suggest that autophagy affects metabolism and endogenous levels of GAs and cytokinin in rice anthers. Reduction in bioactive GAs in the autophagy-deficient mutant may partially explain the defects in pollen maturation of the autophagy-deficient mutant, but tapetal autophagy also plays other specific roles in fertilization.
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Affiliation(s)
- Takamitsu Kurusu
- Department of Applied Biological Science, Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
| | - Tomoko Koyano
- Department of Applied Biological Science, Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
| | - Nobutaka Kitahata
- Department of Applied Biological Science, Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
- Imaging Frontier Center, Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
| | - Mikiko Kojima
- Plant Productivity Systems Research Group, RIKEN Center for Sustainable Resource Science Yokohama, Japan
| | - Shigeru Hanamata
- Imaging Frontier Center, Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
| | - Hitoshi Sakakibara
- Plant Productivity Systems Research Group, RIKEN Center for Sustainable Resource Science Yokohama, Japan
| | - Kazuyuki Kuchitsu
- Department of Applied Biological Science, Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
- Imaging Frontier Center, Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
- CONTACT Dr. Kazuyuki Kuchitsu Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
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Kurusu T, Kuchitsu K. Autophagy, programmed cell death and reactive oxygen species in sexual reproduction in plants. JOURNAL OF PLANT RESEARCH 2017; 130:491-499. [PMID: 28364377 DOI: 10.1007/s10265-017-0934-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 03/14/2017] [Indexed: 05/18/2023]
Abstract
Autophagy is one of the major cellular processes of recycling of proteins, metabolites and intracellular organelles, and plays crucial roles in the regulation of innate immunity, stress responses and programmed cell death (PCD) in many eukaryotes. It is also essential in development and sexual reproduction in many animals. In plants, although autophagy-deficient mutants of Arabidopsis thaliana show phenotypes in abiotic and biotic stress responses, their life cycle seems normal and thus little had been known until recently about the roles of autophagy in development and reproduction. Rice mutants defective in autophagy show sporophytic male sterility and immature pollens, indicating crucial roles of autophagy during pollen maturation. Enzymatic production of reactive oxygen species (ROS) by respiratory burst oxidase homologues (Rbohs) play multiple roles in regulating anther development, pollen tube elongation and fertilization. Significance of autophagy and ROS in the regulation of PCD of transient cells during plant sexual reproduction is discussed in comparison with animals.
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Affiliation(s)
- Takamitsu Kurusu
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo, 192-0982, Japan
- Imaging Frontier Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Kazuyuki Kuchitsu
- Imaging Frontier Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan.
- Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan.
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Minamino N, Kanazawa T, Nishihama R, Yamato KT, Ishizaki K, Kohchi T, Nakano A, Ueda T. Dynamic reorganization of the endomembrane system during spermatogenesis in Marchantia polymorpha. JOURNAL OF PLANT RESEARCH 2017; 130:433-441. [PMID: 28160149 DOI: 10.1007/s10265-017-0909-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 12/29/2016] [Indexed: 05/18/2023]
Abstract
The processes involved in sexual reproduction have been diversified during plant evolution. Whereas charales, bryophytes, pteridophytes, and some gymnosperms utilize motile sperm as male gametes, in other gymnosperms and angiosperms the immotile sperm cells are delivered to the egg cells through elongated pollen tubes. During formation of the motile sperms, cells undergo a dynamic morphological transformation including drastic changes in shape and the generation of locomotor architecture. The molecular mechanism involved in this process remains mostly unknown. Membrane trafficking fulfills the exchange of various proteins and lipids among single membrane-bound organelles in eukaryotic cells, contributing to various biological functions. RAB GTPases and SNARE proteins are evolutionarily conserved key machineries of membrane trafficking mechanisms, which regulate tethering and fusion of the transport vesicles to target membranes. Our observation of fluorescently tagged plasma membrane-resident SNARE proteins demonstrated that these proteins relocalize to spherical structures during the late stages in spermiogenesis. Similar changes in subcellular localization were also observed for other fluorescently tagged SNARE proteins and a RAB GTPase, which acts on other organelles including the Golgi apparatus and endosomes. Notably, a vacuolar SNARE, MpVAMP71, was localized on the membrane of the spherical structures. Electron microscopic analysis revealed that there are many degradation-related structures such as multi-vesicular bodies, autophagosomes, and autophagic bodies containing organelles. Our results indicate that the cell-autonomous degradation pathway plays a crucial role in the removal of membrane components and the cytoplasm during spermiogenesis of Marchantia polymorpha. This process differs substantially from mammalian spermatogenesis in which phagocytic removal of excess cytoplasm involves neighboring cells.
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Affiliation(s)
- Naoki Minamino
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Division of Cellular Dynamics, National Institute for Basic Biology, Nishigonaka 38, Myodaiji, Okazaki, Aichi, 444-8585, Japan
| | - Takehiko Kanazawa
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Division of Cellular Dynamics, National Institute for Basic Biology, Nishigonaka 38, Myodaiji, Okazaki, Aichi, 444-8585, Japan
| | - Ryuichi Nishihama
- Graduate School of Biostudies, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Katsuyuki T Yamato
- Faculty of Biology-Oriented Science and Technology, Kindai University, Nishimitani, Kinokawa, Wakayama, 649-6493, Japan
| | - Kimitsune Ishizaki
- Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan
| | - Takayuki Kohchi
- Graduate School of Biostudies, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Akihiko Nakano
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Live Cell Super-Resolution Imaging Research Team, RIKEN Center for Advanced Photonics, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Takashi Ueda
- Division of Cellular Dynamics, National Institute for Basic Biology, Nishigonaka 38, Myodaiji, Okazaki, Aichi, 444-8585, Japan.
- Japan Science and Technology Agency (JST), PRESTO, 4-1-8 Honcho Kawaguchi, Saitama, 332-0012, Japan.
- Department of Basic Biology, SOKENDAI (Graduate University for Advanced Studies), Okazaki, Aichi, 444-8585, Japan.
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Schwarz V, Andosch A, Geretschläger A, Affenzeller M, Lütz-Meindl U. Carbon starvation induces lipid degradation via autophagy in the model alga Micrasterias. JOURNAL OF PLANT PHYSIOLOGY 2017; 208:115-127. [PMID: 27936433 DOI: 10.1016/j.jplph.2016.11.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 11/17/2016] [Accepted: 11/18/2016] [Indexed: 05/08/2023]
Abstract
Autophagy is regarded as crucial intracellular process in plant development but also in intracellular stress response. It is known to be controlled by the energy level of the cell and consequently can be triggered by energy deprivation. In this study carbon starvation evoked in different ways was investigated in the freshwater algae model system Micrasterias denticulata (Streptophyta) which is closely related to higher plants. Cells exposed to the photosynthesis inhibiting herbicide DCMU, to the glycolysis inhibitor 2-Deoxy-d-glucose and to complete darkness over up to 9 weeks for preventing metabolism downstream of glucose supply, were investigated by means of Nile red staining and analyses in CLSM, and TEM after cryo-preparation. Our results show that lipid bodies containing both neutral and polar lipids are evenly distributed inside the chloroplast in control cells. During carbon starvation they are displaced into the cytoplasm and are either degraded via autophagy and/or excreted from the cell. Upon discharge from the chloroplast lipid bodies become engulfed by double membranes probably deriving from the ER, thus forming autophagosomes which later fuse with vacuoles. Coincidently indications for autophagy of other organelles and cytoplasmic portions were found during starvation and particularly in DCMU treated cells the number of starch grains decreased and pyrenoids disintegrated. Additionally our molecular data provide first evidence for the existence of a single ATG8 isoform in Micrasterias. ATG8 is known as main regulator of both bulk and selective autophagy in eucaryotes. Our study indicates that lipid degradation during carbon starvation is achieved via "classical" autophagy in the alga Micrasterias. This process has so far only been very rarely observed in plant cells and seems to allow recruitment of lipids for energy supply on the one hand and elimination of unusable or toxicated lipids on the other hand.
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Affiliation(s)
- Viola Schwarz
- Plant Physiology Division, Cell Biology and Physiology Department, University of Salzburg, A-5020 Salzburg, Austria
| | - Ancuela Andosch
- Plant Physiology Division, Cell Biology and Physiology Department, University of Salzburg, A-5020 Salzburg, Austria
| | - Anja Geretschläger
- Plant Physiology Division, Cell Biology and Physiology Department, University of Salzburg, A-5020 Salzburg, Austria
| | - Matthias Affenzeller
- AG Ecology, Biodiversity and Evolution of Plants, Department of Ecology and Evolution, University of Salzburg, A-5020 Salzburg, Austria
| | - Ursula Lütz-Meindl
- Plant Physiology Division, Cell Biology and Physiology Department, University of Salzburg, A-5020 Salzburg, Austria.
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Bagniewska-Zadworna A, Arasimowicz-Jelonek M. The mystery of underground death: cell death in roots during ontogeny and in response to environmental factors. PLANT BIOLOGY (STUTTGART, GERMANY) 2016; 18:171-84. [PMID: 26332667 DOI: 10.1111/plb.12391] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Accepted: 08/24/2015] [Indexed: 05/26/2023]
Abstract
Programmed cell death (PCD) is an essential part of the ontogeny of roots and their tolerance/resistance mechanisms, allowing adaptation and growth under adverse conditions. It occurs not only at the cellular and subcellular level, but also at the levels of tissues, organs and even whole plants. This process involves a wide spectrum of mechanisms, from signalling and the expression of specific genes to the degradation of cellular structures. The major goals of this review were to broaden current knowledge about PCD processes in roots, and to identify mechanisms associated with both developmental and stress-associated cell death in roots. Vacuolar cell death, when cell contents are removed by a combination of an autophagy-associated process and the release of hydrolases from a collapsed vacuole, is responsible for programming self-destruction. Regardless of the conditions and factors inducing PCD, its subcellular events usually include the accumulation of autophagosome-like structures, and the formation of massive lytic compartments. In some cases these are followed by the nuclear changes of chromatin condensation and DNA fragmentation. Tonoplast disruption and vacuole implosion occur very rapidly, are irreversible and constitute a definitive step toward cell death in roots. Active cell elimination plays an important role in various biological processes in the life history of plants, leading to controlled cellular death during adaptation to changing environmental conditions, and organ remodelling throughout development and senescence.
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Affiliation(s)
- A Bagniewska-Zadworna
- Department of General Botany, Faculty of Biology, Institute of Experimental Biology, Adam Mickiewicz University, Poznań, Poland
| | - M Arasimowicz-Jelonek
- Department of Plant Ecophysiology, Faculty of Biology, Institute of Experimental Biology, Adam Mickiewicz University, Poznań, Poland
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Wang P, Sun X, Jia X, Wang N, Gong X, Ma F. Characterization of an Autophagy-Related Gene MdATG8i from Apple. FRONTIERS IN PLANT SCIENCE 2016; 7:720. [PMID: 27252732 PMCID: PMC4879346 DOI: 10.3389/fpls.2016.00720] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 05/10/2016] [Indexed: 05/02/2023]
Abstract
Nutrient deficiencies restrict apple (Malus sp.) tree growth and productivity in Northwest China. The process of autophagy, a conserved degradation pathway in eukaryotic cells, has important roles in nutrient-recycling and helps improve plant performance during periods of nutrient-starvation. Little is known about the functioning of autophagy-related genes (ATGs) in apple. In this study, one of the ATG8 gene family members MdATG8i was isolated from Malus domestica. MdATG8i has conserved putative tubulin binding sites and ATG7 interaction domains. A 1865-bp promoter region cloned from apple genome DNA was predicated to have cis-regulatory elements responsive to light, environmental stresses, and hormones. MdATG8i transcriptions were induced in response to leaf senescence, nitrogen depletion, and oxidative stress. At cellular level, MdATG8i protein was expressed in the nucleus and cytoplasm of onion epidermal cells. Yeast two-hybrid tests showed that MdATG8i could interact with MdATG7a and MdATG7b. In Arabidopsis, its heterologous expression was associated with enhanced vegetative growth, leaf senescence, and tolerance to nitrogen- and carbon-starvation. MdATG8i-overexpressing "Orin" apple callus lines also displayed improved tolerance to nutrient-limited conditions. Our results demonstrate that MdATG8i protein could function in autophagy in a conserved way, as a positive regulator in the response to nutrient-starvation.
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45
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Wada S, Hayashida Y, Izumi M, Kurusu T, Hanamata S, Kanno K, Kojima S, Yamaya T, Kuchitsu K, Makino A, Ishida H. Autophagy supports biomass production and nitrogen use efficiency at the vegetative stage in rice. PLANT PHYSIOLOGY 2015; 168:60-73. [PMID: 25786829 PMCID: PMC4424030 DOI: 10.1104/pp.15.00242] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2015] [Accepted: 03/17/2015] [Indexed: 05/18/2023]
Abstract
Much of the nitrogen in leaves is distributed to chloroplasts, mainly in photosynthetic proteins. During leaf senescence, chloroplastic proteins, including Rubisco, are rapidly degraded, and the released nitrogen is remobilized and reused in newly developing tissues. Autophagy facilitates the degradation of intracellular components for nutrient recycling in all eukaryotes, and recent studies have revealed critical roles for autophagy in Rubisco degradation and nitrogen remobilization into seeds in Arabidopsis (Arabidopsis thaliana). Here, we examined the function of autophagy in vegetative growth and nitrogen usage in a cereal plant, rice (Oryza sativa). An autophagy-disrupted rice mutant, Osatg7-1, showed reduced biomass production and nitrogen use efficiency compared with the wild type. While Osatg7-1 showed early visible leaf senescence, the nitrogen concentration remained high in the senescent leaves. (15)N pulse chase analysis revealed suppression of nitrogen remobilization during leaf senescence in Osatg7-1. Accordingly, the reduction of nitrogen available for newly developing tissues in Osatg7-1 likely led its reduced leaf area and tillers. The limited leaf growth in Osatg7-1 decreased the photosynthetic capacity of the plant. Much of the nitrogen remaining in senescent leaves of Osatg7-1 was in soluble proteins, and the Rubisco concentration in senescing leaves of Osatg7-1 was about 2.5 times higher than in the wild type. Transmission electron micrographs showed a cytosolic fraction rich with organelles in senescent leaves of Osatg7-1. Our results suggest that autophagy contributes to efficient nitrogen remobilization at the whole-plant level by facilitating protein degradation for nitrogen recycling in senescent leaves.
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Affiliation(s)
- Shinya Wada
- Department of Applied Plant Science, Graduate School of Agricultural Sciences, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan (S.W, Y.H., K.Ka., S.K., T.Y., A.M., H.I.); Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University, Katahira, Aoba-ku, Sendai 980-8577, Japan (M.I.);Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan (M.I.); School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan (T.K.);Department of Applied Biological Science (T.K., S.H., K.Ku.), and Research Institute for Science and Technology (T.K., K.Ku.), Tokyo University of Science, Noda, Chiba 278-8510, Japan; andCREST, Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0076, Japan (A.M.)
| | - Yasukzu Hayashida
- Department of Applied Plant Science, Graduate School of Agricultural Sciences, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan (S.W, Y.H., K.Ka., S.K., T.Y., A.M., H.I.); Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University, Katahira, Aoba-ku, Sendai 980-8577, Japan (M.I.);Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan (M.I.); School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan (T.K.);Department of Applied Biological Science (T.K., S.H., K.Ku.), and Research Institute for Science and Technology (T.K., K.Ku.), Tokyo University of Science, Noda, Chiba 278-8510, Japan; andCREST, Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0076, Japan (A.M.)
| | - Masanori Izumi
- Department of Applied Plant Science, Graduate School of Agricultural Sciences, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan (S.W, Y.H., K.Ka., S.K., T.Y., A.M., H.I.); Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University, Katahira, Aoba-ku, Sendai 980-8577, Japan (M.I.);Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan (M.I.); School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan (T.K.);Department of Applied Biological Science (T.K., S.H., K.Ku.), and Research Institute for Science and Technology (T.K., K.Ku.), Tokyo University of Science, Noda, Chiba 278-8510, Japan; andCREST, Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0076, Japan (A.M.)
| | - Takamitsu Kurusu
- Department of Applied Plant Science, Graduate School of Agricultural Sciences, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan (S.W, Y.H., K.Ka., S.K., T.Y., A.M., H.I.); Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University, Katahira, Aoba-ku, Sendai 980-8577, Japan (M.I.);Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan (M.I.); School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan (T.K.);Department of Applied Biological Science (T.K., S.H., K.Ku.), and Research Institute for Science and Technology (T.K., K.Ku.), Tokyo University of Science, Noda, Chiba 278-8510, Japan; andCREST, Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0076, Japan (A.M.)
| | - Shigeru Hanamata
- Department of Applied Plant Science, Graduate School of Agricultural Sciences, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan (S.W, Y.H., K.Ka., S.K., T.Y., A.M., H.I.); Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University, Katahira, Aoba-ku, Sendai 980-8577, Japan (M.I.);Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan (M.I.); School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan (T.K.);Department of Applied Biological Science (T.K., S.H., K.Ku.), and Research Institute for Science and Technology (T.K., K.Ku.), Tokyo University of Science, Noda, Chiba 278-8510, Japan; andCREST, Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0076, Japan (A.M.)
| | - Keiichi Kanno
- Department of Applied Plant Science, Graduate School of Agricultural Sciences, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan (S.W, Y.H., K.Ka., S.K., T.Y., A.M., H.I.); Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University, Katahira, Aoba-ku, Sendai 980-8577, Japan (M.I.);Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan (M.I.); School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan (T.K.);Department of Applied Biological Science (T.K., S.H., K.Ku.), and Research Institute for Science and Technology (T.K., K.Ku.), Tokyo University of Science, Noda, Chiba 278-8510, Japan; andCREST, Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0076, Japan (A.M.)
| | - Soichi Kojima
- Department of Applied Plant Science, Graduate School of Agricultural Sciences, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan (S.W, Y.H., K.Ka., S.K., T.Y., A.M., H.I.); Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University, Katahira, Aoba-ku, Sendai 980-8577, Japan (M.I.);Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan (M.I.); School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan (T.K.);Department of Applied Biological Science (T.K., S.H., K.Ku.), and Research Institute for Science and Technology (T.K., K.Ku.), Tokyo University of Science, Noda, Chiba 278-8510, Japan; andCREST, Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0076, Japan (A.M.)
| | - Tomoyuki Yamaya
- Department of Applied Plant Science, Graduate School of Agricultural Sciences, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan (S.W, Y.H., K.Ka., S.K., T.Y., A.M., H.I.); Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University, Katahira, Aoba-ku, Sendai 980-8577, Japan (M.I.);Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan (M.I.); School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan (T.K.);Department of Applied Biological Science (T.K., S.H., K.Ku.), and Research Institute for Science and Technology (T.K., K.Ku.), Tokyo University of Science, Noda, Chiba 278-8510, Japan; andCREST, Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0076, Japan (A.M.)
| | - Kazuyuki Kuchitsu
- Department of Applied Plant Science, Graduate School of Agricultural Sciences, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan (S.W, Y.H., K.Ka., S.K., T.Y., A.M., H.I.); Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University, Katahira, Aoba-ku, Sendai 980-8577, Japan (M.I.);Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan (M.I.); School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan (T.K.);Department of Applied Biological Science (T.K., S.H., K.Ku.), and Research Institute for Science and Technology (T.K., K.Ku.), Tokyo University of Science, Noda, Chiba 278-8510, Japan; andCREST, Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0076, Japan (A.M.)
| | - Amane Makino
- Department of Applied Plant Science, Graduate School of Agricultural Sciences, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan (S.W, Y.H., K.Ka., S.K., T.Y., A.M., H.I.); Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University, Katahira, Aoba-ku, Sendai 980-8577, Japan (M.I.);Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan (M.I.); School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan (T.K.);Department of Applied Biological Science (T.K., S.H., K.Ku.), and Research Institute for Science and Technology (T.K., K.Ku.), Tokyo University of Science, Noda, Chiba 278-8510, Japan; andCREST, Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0076, Japan (A.M.)
| | - Hiroyuki Ishida
- Department of Applied Plant Science, Graduate School of Agricultural Sciences, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan (S.W, Y.H., K.Ka., S.K., T.Y., A.M., H.I.); Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University, Katahira, Aoba-ku, Sendai 980-8577, Japan (M.I.);Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan (M.I.); School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan (T.K.);Department of Applied Biological Science (T.K., S.H., K.Ku.), and Research Institute for Science and Technology (T.K., K.Ku.), Tokyo University of Science, Noda, Chiba 278-8510, Japan; andCREST, Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0076, Japan (A.M.)
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46
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Gayral M, Bakan B, Dalgalarrondo M, Elmorjani K, Delluc C, Brunet S, Linossier L, Morel MH, Marion D. Lipid partitioning in maize (Zea mays L.) endosperm highlights relationships among starch lipids, amylose, and vitreousness. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:3551-3558. [PMID: 25794198 DOI: 10.1021/acs.jafc.5b00293] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Content and composition of maize endosperm lipids and their partition in the floury and vitreous regions were determined for a set of inbred lines. Neutral lipids, i.e., triglycerides and free fatty acids, accounted for more than 80% of endosperm lipids and are almost 2 times higher in the floury than in the vitreous regions. The composition of endosperm lipids, including their fatty acid unsaturation levels, as well as their distribution may be related to metabolic specificities of the floury and vitreous regions in carbon and nitrogen storage and to the management of stress responses during endosperm cell development. Remarkably, the highest contents of starch lipids were observed systematically within the vitreous endosperm. These high amounts of starch lipids were mainly due to lysophosphatidylcholine and were tightly linked to the highest amylose content. Consequently, the formation of amylose-lysophosphatidylcholine complexes has to be considered as an outstanding mechanism affecting endosperm vitreousness.
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Affiliation(s)
- Mathieu Gayral
- †INRA, Biopolymers, Interactions, Assemblies Research Unit, La Géraudière 44316 Nantes Cedex 3, France
| | - Bénédicte Bakan
- †INRA, Biopolymers, Interactions, Assemblies Research Unit, La Géraudière 44316 Nantes Cedex 3, France
| | - Michele Dalgalarrondo
- †INRA, Biopolymers, Interactions, Assemblies Research Unit, La Géraudière 44316 Nantes Cedex 3, France
| | - Khalil Elmorjani
- †INRA, Biopolymers, Interactions, Assemblies Research Unit, La Géraudière 44316 Nantes Cedex 3, France
| | | | - Sylvie Brunet
- §Limagrain Cereal Ingredients ZAC Les Portes de Riom, Avenue George Gershwin 63200 RIOM Cedex, France
| | - Laurent Linossier
- §Limagrain Cereal Ingredients ZAC Les Portes de Riom, Avenue George Gershwin 63200 RIOM Cedex, France
| | - Marie-Hélène Morel
- ∥INRA, Agropolymers Engineering and Emerging Technologies, 2 place Pierre Viala, 34060 Montpellier Cedex 02, France
| | - Didier Marion
- †INRA, Biopolymers, Interactions, Assemblies Research Unit, La Géraudière 44316 Nantes Cedex 3, France
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47
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Bassham DC, Crespo JL. Autophagy in plants and algae. FRONTIERS IN PLANT SCIENCE 2014; 5:679. [PMID: 25520731 PMCID: PMC4248838 DOI: 10.3389/fpls.2014.00679] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Accepted: 11/13/2014] [Indexed: 05/06/2023]
Affiliation(s)
- Diane C. Bassham
- Department of Genetics, Development and Cell Biology, Iowa State UniversityAmes, IA, USA
- *Correspondence: ;
| | - Jose L. Crespo
- Instituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas-Universidad de SevillaSeville, Spain
- *Correspondence: ;
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