L-proline alleviates heat stress of tomato plants grown under protected environment

Tonhati, Rachel; Mello, Simone C.; Momesso, Paulo; Pedroso, Rafael Munhoz

doi:10.1016/j.scienta.2020.109370

Cited by 38 publications

(26 citation statements)

References 31 publications

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“…In nature, plants often face a mild drought combined with other factors, thus the effect of solely water deficit is masked by the other two stresses—heat and photo-oxidation [ 4 ]. Yield productivity is affected by climate changes, which involve repeated occurrences of limited water supply combined with elevated CO 2 and high temperature, generating enhanced plant drought tolerance [ 5 , 6 ]. Many recent studies are focused on plastic responses at phenotypic or gene expression levels, aiming to dissect out the genetic bases of responses to drought stress.…”

Section: Introductionmentioning

confidence: 99%

Leaf Soluble Sugars and Free Amino Acids as Important Components of Abscisic Acid—Mediated Drought Response in Tomato

Živanović

Komić

Tosti

et al. 2020

Plants

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Water deficit has a global impact on plant growth and crop yield. Climate changes are going to increase the intensity, duration and frequency of severe droughts, particularly in southern and south-eastern Europe, elevating the water scarcity issues. We aimed to assess the contribution of endogenous abscisic acid (ABA) in the protective mechanisms against water deficit, including stomatal conductance, relative water potential and the accumulation of osmoprotectants, as well as on growth parameters. To achieve that, we used a suitable model system, ABA-deficient tomato mutant, flacca and its parental line. Flacca mutant exhibited constitutively higher levels of soluble sugars (e.g., galactose, arabinose, sorbitol) and free amino acids (AAs) compared with the wild type (WT). Water deficit provoked the strong accumulation of proline in both genotypes, and total soluble sugars only in flacca. Upon re-watering, these osmolytes returned to the initial levels in both genotypes. Our results indicate that flacca compensated higher stomatal conductance with a higher constitutive level of free sugars and AAs. Additionally, we suggest that the accumulation of AAs, particularly proline and its precursors and specific branched-chain AAs in both, glucose and sucrose in flacca, and sorbitol in WT, could contribute to maintaining growth rate during water deficit and recovery in both tomato genotypes.

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Section: Introductionmentioning

confidence: 99%

Leaf Soluble Sugars and Free Amino Acids as Important Components of Abscisic Acid—Mediated Drought Response in Tomato

Živanović

Komić

Tosti

et al. 2020

Plants

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“…Many strategies could be adapted to overcome these stresses depending on the kind of stress, cultivated plants and its growth stage (Zhou et al, 2020). Several researchers reported about these strategies for tomato seedlings, which include the application of spermidine (Sang et al, 2016), Ca, Mg and K compounds (Sakhonwasee andPhingkasan, 2017 andNafees et al, 2019), ascorbic acid (Alayafi, 2019), melatonin and salicylic acid (Jahanet al, 2019, 2020b) as well as proline (Tonhati et al, 2020). Therefore, the production of tomato seedlings under greenhouse conditions may face some stresses, which still need more and more investigations in particular in arid and semi-arid regions in summer (Fig.…”

Section: Tomato As a Model Plantmentioning

confidence: 99%

“…This problem could be distinguished particularly in arid and semi-arid zones, which the greenhouse in summer may create a heat stress leading to soil salinization and damage for cultivated plants. These elevated temperatures in greenhouse may cause heat stress leading to generate oxidative stress and ROS, which severely damage the yield of tomato (Tonhati et al, 2020).…”

Section: Management and Production Of Protected Tomato Seedlings Undementioning

confidence: 99%

“…It is worth to mention that, the optimum temperature for tomato seedlings growth ranges from 18 to 30 °C, whereas the growing of seedling may decrease when it increases more than 35 °C (EL-Aidy et al 2020). On the other hand, the optimum temperature during tomato plant flowering and fruit growth ranges from 18 to 25 °C (Tonhati et al, 2020). Therefore, the growth and production of tomato seedlings under greenhouse conditions may mainly depends on the growth stage, the stressful conditions and its duration, which control to what extent control the damage in cell metabolism functions.…”

Section: Management and Production Of Protected Tomato Seedlings Undementioning

confidence: 99%

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Management of Heat Stress in Tomato Seedlings under Arid and Semi-Arid Regions: A Review

Abdalla¹,

Taha

El-Ramady

et al. 2020

EBSS

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T HE production of protected cultivation of vegetables could be considered as a sustainable solution in arid and semi-arid regions.These regions already suffer from raising temperature andthe global warmingwill aggravate this, whichrepresents a great challenge facing our universe nowadays. Hence, the production of vegetables and tomato under greenhouse system during the high temperatures may be considered a serious problem should be avoided in these arid zonesin summer due to heat stress.The heat stress may cause a lot of troubles for the tomato seedlings in greenhouses in summer starting with the photosynthetic rate, and the metabolism processes in seedlings and in turn the growth and development of these seedlings. Although studies have recognized heat stress on tomato seedlings, research has yet to systematically investigate the effect of heat stress on tomato seedlings in greenhouse in summer under arid and semi-arid regions particularly in developing countries, which their greenhouses have not any climate controllers. Therefore, the management of tomato seedlings may need to address the production problems caused by heat stress in greenhouse conditions particularly in arid and semi-arid zones

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“…Proline helps plants keep a fully functional photosynthetic apparatus by stabilizing the photosynthetic complex II as well as membrane proteins such as rubisco [ 30 ]. Studies have shown that proline accumulation improves heat stress tolerance in a range of plant species such as tomato [ 31 ], rice [ 32 ], chickpea [ 33 ] and barley [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

Label-free quantitative proteomic analysis of alfalfa in response to microRNA156 under high temperature

et al. 2020

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Background Abiotic stress, including heat, is one of the major factors that affect alfalfa growth and forage yield. The small RNA, microRNA156 (miR156), regulates multiple traits in alfalfa during abiotic stress. The aim of this study was to explore the role of miR156 in regulating heat response in alfalfa at the protein level. Results In this study, we compared an empty vector control and miR156 overexpressing (miR156OE) alfalfa plants after exposing them to heat stress (40 °C) for 24 h. We measured physiological parameters of control and miR156OE plants under heat stress, and collected leaf samples for protein analysis. A higher proline and antioxidant contents were detected in miR156OE plants than in controls under heat stress. Protein samples were analyzed by label-free quantification proteomics. Across all samples, a total of 1878 protein groups were detected. Under heat stress, 45 protein groups in the empty vector plants were significantly altered (P < 0.05; |log2FC| > 2). Conversely, 105 protein groups were significantly altered when miR156OE alfalfa was subjected to heat stress, of which 91 were unique to miR156OE plants. The identified protein groups unique to miR156OE plants were related to diverse functions including metabolism, photosynthesis, stress-response and plant defenses. Furthermore, we identified transcription factors in miR156OE plants, which belonged to squamosa promoter binding-like protein, MYB, ethylene responsive factors, AP2 domain, ABA response element binding factor and bZIP families of transcription factors. Conclusions These results suggest a positive role for miR156 in heat stress response in alfalfa. They reveal a miR156-regulated network of mechanisms at the protein level to modulate heat responses in alfalfa.

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L-proline alleviates heat stress of tomato plants grown under protected environment

Cited by 38 publications

References 31 publications

Leaf Soluble Sugars and Free Amino Acids as Important Components of Abscisic Acid—Mediated Drought Response in Tomato

Leaf Soluble Sugars and Free Amino Acids as Important Components of Abscisic Acid—Mediated Drought Response in Tomato

Management of Heat Stress in Tomato Seedlings under Arid and Semi-Arid Regions: A Review

Label-free quantitative proteomic analysis of alfalfa in response to microRNA156 under high temperature

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