Salt-adaptive strategies in oil seed crop Ricinus communis early seedlings (cotyledon vs. true leaf) revealed from proteomics analysis

Wang, Yingnan; Peng, Xiaoyuan; Salvato, Fernanda; Wang, Yongcui; Zhou, Zhiqiang; Lin, Jixiang

doi:10.1016/j.ecoenv.2018.12.046

Cited by 26 publications

(14 citation statements)

References 71 publications

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“…It has been reported that genes involved in metabolism and energy are activated early in seedlings and persist in functioning during growth (Guo et al, 2009 ). Our results suggest that these TDF-related genes should be necessary for the regulation of various biological processes and synthesis of numerous substances in sustaining cotyledon growth and response to stress (Street et al, 2008 ; Liu et al, 2017 ; Wang et al, 2019b ). Corresponding to the unique SC C 4 system and high photosynthetic efficiency in S. aralocaspica , in this study, ~5% of the 328 TDFs were photosynthesis-related in the cotyledon, and half of which were associated with the C 4 photosynthetic pathway.…”

Section: Discussionmentioning

confidence: 94%

The Developmental Delay of Seedlings With Cotyledons Only Confers Stress Tolerance to Suaeda aralocaspica (Chenopodiaceae) by Unique Performance on Morphology, Physiology, and Gene Expression

Cao

Chen

et al. 2022

Front. Plant Sci.

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Cotyledons play an important role in seedling establishment, although they may just exist for a short time and become senescent upon the emergence of euphylla. So far, the detailed function of cotyledons has not been well understood. Suaeda aralocaspica is an annual halophyte distributed in cold deserts; its cotyledons could exist for a longer time, even last until maturity, and they must exert a unique function in seedling development. Therefore, in this study, we conducted a series of experiments to investigate the morphological and physiological performances of cotyledons under salt stress at different developmental stages. The results showed that the cotyledons kept growing slowly to maintain the normal physiological activities of seedlings by balancing phytohormone levels, accumulating osmoprotectants and antioxidants, and scavenging reactive oxygen species (ROS). Salt stress activated the expression of osmoprotectant-related genes and enhanced the accumulation of related primary metabolites. Furthermore, differentially expressed transcriptional profiles of the cotyledons were also analyzed by cDNA-AFLP to gain an understanding of cotyledons in response to development and salt stress, and the results revealed a progressive increase in the expression level of development-related genes, which accounted for a majority of the total tested TDFs. Meanwhile, key photosynthetic and important salt stress-related genes also actively responded. All these performances suggest that “big cotyledons” are experiencing a delayed but active developmental process, by which S. aralocaspica may survive the harsh condition of the seedling stage.

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Section: Discussionmentioning

confidence: 94%

The Developmental Delay of Seedlings With Cotyledons Only Confers Stress Tolerance to Suaeda aralocaspica (Chenopodiaceae) by Unique Performance on Morphology, Physiology, and Gene Expression

Cao

Chen

et al. 2022

Front. Plant Sci.

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“…Falakboland et al (2017), working with 12 varieties of Hordeun vulgare , determined that the K + cation modulates tolerance to salt stress, and these authors suggested that this element is crucial for enzyme activation and protein synthesis stabilization. Wang et al (2019), using two leaf types (cotyledon and true leaf) in Ricinus communis seedlings submitted to Na stress, proved that the K + /Na + ratio is significantly affected, causing disorders in physiological processes.…”

Section: Discussionmentioning

confidence: 99%

Anatomical changes in stem and root of soybean plants submitted to salt stress

2020

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The soybean is a legume that is widely cultivated in many countries due to the high levels of protein and oil contained in its seed, and is used for human and animal nutrition. However, salinity affects more than 800 million hectares worldwide, limiting global agricultural production. • The aim of this research was to evaluate the structural behaviour of the roots and stems under progressive salt stress, detailing the possible anatomical modifications to these organs in soybean plants during this stress. The plants were randomized into five treatments (0, 50, 100, 150 and 200 mM NaCl). • All the root regions studied and exposed to 100 mM Na + exhibited increases in the epidermis and endodermis and formation of lysogenic aerenchyma with increasing salinity, revealing the protective roles of these structures in reducing Na + influx. In the stem, increases in the cortex and pith in the first internode subject to 100 mM Na + suggest anatomical responses that aim to minimize oxidative stress. • Soybean plants subjected to progressive salt stress (>50 mM Na +) avoided cavitation and loss of function linked to vessel elements, reducing the metaxylem in all the root and stem regions analysed. Finally, our results confirm anatomical changes to the roots and stems.

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“…It should also be noted that as a response to signals from roots to balance the decrease in water potential (Negrão et al, 2017). Most plants in saline environment could accumulate a large amount of osmoregulators in the protoplasm to maintain osmotic balance, due to ion accumulation in vacuole (Wang et al, 2019).…”

Section: Discussionmentioning

confidence: 99%