Drought stress-induced autophagy gene expression is correlated with carbohydrate concentrations in Caragana korshinskii

Luo, Xueli; Zhang, Yanyu; Wu, Hongdou; Bai, Juan

doi:10.1007/s00709-020-01507-y

Cited by 6 publications

(5 citation statements)

References 55 publications

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“…In addition, we also found that starch content in the subtending leaves decreased after 5 DAT. Our results probably occurred because LD restricted photosynthates (sucrose and starch) production and sucrose transport (Akanksha et al, 2017) but promoting the conversion of starch to sucrose during the early stage of LD, which resulted in an increased proportion of sucrose in leaves participating in osmotic regulation (Talbott & Zeiger, 1998) and protecting the cell membrane from dehydration (Luo et al, 2020; Wu et al, 2017). However, as the duration of drought stress lengthens, the increased content of sucrose converted from starch was not sufficient to compensate for the sucrose reduction induced by a decreased Pn (Plaut et al, 2004), which resulted in a lower sucrose content in the subtending leaves during the late stage of LD.…”

Section: Discussionmentioning

confidence: 91%

Photosynthetic characteristics of subtending leaves and their relationships with soybean pod development under heat, drought and combined stresses

Zhang

Wei

et al. 2022

J Agronomy Crop Science

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Soybean is usually grown under rain‐fed conditions, and long‐term drought stress often occurs with short‐term heat stress. This study aimed to investigate changes in the photosynthetic characteristics of subtending leaves and their relationships with pod development under short‐term heat, long‐term drought and their combined stresses. Short‐term heat stress lasted for 5 days began at R5 stage, and long‐term drought stress lasted from R5 stage until maturity, respectively. No significant effect was observed on pod development under short‐term heat stress alone due to unaffected net photosynthetic rate after treatment and PSII recovery after the heat stress release. Except that the reduction of sucrose content had been brought forward from 12 to 5 days after treatment under combined stresses, application of combined stresses caused similar responses to long‐term drought stress alone on the photosynthetic characteristics of subtending leaves and pod development, but more pronounced under combined stresses. Reduced pod weight and seed weight per pod under long‐term drought stress alone or combined stress due to a decrease in the net photosynthetic rate and production of sucrose and starch, especially after 19 days of treatment. Findings from this study demonstrate that under combined stress, long‐term drought stress had a dominant effect on the photosynthetic performance of subtending leaves and pod development over short‐term heat stress; moreover, even short‐term heat stress also exacerbates the negative effects of long‐term drought stress.

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Section: Discussionmentioning

confidence: 91%

Photosynthetic characteristics of subtending leaves and their relationships with soybean pod development under heat, drought and combined stresses

Zhang

Wei

et al. 2022

J Agronomy Crop Science

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“…In agreement with this observation, numerous studies have demonstrated the requirement of ATG8a for autophagosome formation in Arabidopsis during nutrient stress and senescence [ 77 , 78 , 79 ]. Interestingly, the upregulation of autophagy-related genes (ATG8 and ATG12), which is reported to be involved in distinct pathways, in the formation of autophagosome was observed in drought-stressed Caragana korshinskii leaves: a leguminous species that thrives in arid and semi-arid habitats [ 80 ]. Moreover, the high level of NR accumulation in autophagy-related structures associated with PCC chloroplasts in non-stressed B. sinuspersici cells indicated that the single-cell C 4 species might adopt a similar drought-tolerant mechanism to survive in extreme saline and arid environment ( Figure 8 A left panel).…”

Section: Discussionmentioning

confidence: 99%

Chloroplast Envelopes Play a Role in the Formation of Autophagy-Related Structures in Plants

Yanagisawa

Chuong

2023

Plants

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Autophagy is a degradation process of cytoplasmic components that is conserved in eukaryotes. One of the hallmark features of autophagy is the formation of double-membrane structures known as autophagosomes, which enclose cytoplasmic content destined for degradation. Although the membrane source for the formation of autophagosomes remains to be determined, recent studies indicate the involvement of various organelles in autophagosome biogenesis. In this study, we examined the autophagy process in Bienertia sinuspersici: one of four terrestrial plants capable of performing C4 photosynthesis in a single cell (single-cell C4 species). We demonstrated that narrow tubules (stromule-like structures) 30–50 nm in diameter appear to extend from chloroplasts to form the membrane-bound structures (autophagosomes or autophagy-related structures) in chlorenchyma cells of B. sinuspersici during senescence and under oxidative stress. Immunoelectron microscopic analysis revealed the localization of stromal proteins to the stromule-like structures, sequestering portions of the cytoplasm in chlorenchyma cells of oxidative stress-treated leaves of B. sinuspersici and Arabidopsis thaliana. Moreover, the fluorescent marker for autophagosomes GFP-ATG8, colocalized with the autophagic vacuole maker neutral red in punctate structures in close proximity to the chloroplasts of cells under oxidative stress conditions. Together our results implicate a role for chloroplast envelopes in the autophagy process induced during senescence or under certain stress conditions in plants.

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“…In yeast, more than 40 autophagy-related genes (Atg) have been identified, half of which constitute the core autophagy machinery, including the Atg1-Atg13 kinase complex, the Atg9 cycling system, the phosphatidylinositol 3-kinase (PtdIns3K) complex and two ubiquitin-like conjugation systems (Atg8 and Atg12) [12]. According to the various available plant genome databases, the orthologs and paralogs of the yeast core autophagy components were identified in plants, ranging from lower species, such as algae, to major agricultural plants, such as cereals and vegetables [13][14][15][16][17][18][19]. Although there are differences among plant species, some components were unidentified in a regular BLAST search, but most of the core autophagy components were conserved.…”

Section: Comparison Of Plants and Yeast Core Autophagy Componentsmentioning

confidence: 99%

“…In addition, ectopically expressed CsATG18a and CsATG18b in Arabidopsis showed enhanced tolerance to osmotic, salt, drought (CsATG18a) or cold (CsATG18b) stress, compared to wild-type plants [14]. Drought stress also up-regulates the expression of the autophagy-related genes ATG1, ATG8, ATG9 and ATG12 in Caragana korshinskii [15]. Homologs of Atg3 from apples are reported to improve transgenic Arabidopsis salt and osmotic stress resistance [92].…”

Section: The Role Of Core Autophagy Components In Plant Abiotic Stressmentioning

confidence: 99%

Autophagy in Plant Abiotic Stress Management

Chen

Dong

Wang

2021

IJMS

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Plants can be considered an open system. Throughout their life cycle, plants need to exchange material, energy and information with the outside world. To improve their survival and complete their life cycle, plants have developed sophisticated mechanisms to maintain cellular homeostasis during development and in response to environmental changes. Autophagy is an evolutionarily conserved self-degradative process that occurs ubiquitously in all eukaryotic cells and plays many physiological roles in maintaining cellular homeostasis. In recent years, an increasing number of studies have shown that autophagy can be induced not only by starvation but also as a cellular response to various abiotic stresses, including oxidative, salt, drought, cold and heat stresses. This review focuses mainly on the role of autophagy in plant abiotic stress management.

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Drought stress-induced autophagy gene expression is correlated with carbohydrate concentrations in Caragana korshinskii

Cited by 6 publications

References 55 publications

Photosynthetic characteristics of subtending leaves and their relationships with soybean pod development under heat, drought and combined stresses

Photosynthetic characteristics of subtending leaves and their relationships with soybean pod development under heat, drought and combined stresses

Chloroplast Envelopes Play a Role in the Formation of Autophagy-Related Structures in Plants

Autophagy in Plant Abiotic Stress Management

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