Mechanisms of heat tolerance in crop plants

Asthir, Bavita

doi:10.1007/s10535-015-0539-5

Cited by 67 publications

(29 citation statements)

References 81 publications

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“…Abiotic stresses, such as heat, drought, and salt, usually cause ROS production and membrane lipid peroxides, leading to the increase of membrane permeability and electrolyte leakage rate (Quinn 1988, Iba 2002, Cramer et al 2011. Malondialdehyde content and REC are important traits and could present the level of membrane lipid peroxides and membrane permeability, respectively (Asthir 2015). An increased membrane permeability and electrolyte leakage rate in Chinese cabbage have been identified under heat stress (Luo et al 1996, Ye et al 1996.…”

Section: Resultsmentioning

confidence: 99%

Physiological and molecular responses of two Chinese cabbage genotypes to heat stress

Qunyan¹,

Yang²,

Cui³

et al. 2019

Biol. plant.

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A comparative investigation of heat stress-mediated physiological and biochemical parameters in conjunction with the expression analysis of heat shock transcription factors (BrHSF) from two different Chinese cabbage genotypes was done to understand the mechanism of heat tolerance. Our results show that the heat-tolerant (2013-33) genotype had a smaller relative electric conductivity, a less malondialdehyde content and a higher maximal efficiency of photosystem II photochemistry than the heat-sensitive (AM160) genotype, and was able to develop the leaf head under heat stress, whereas 'AM160' flailed to develop it. The results also indicate that '2013-33' accumulated a higher amount of soluble sugars and protein under heat stress condition than 'AM160'. However, it warrants to mention that proline content and antioxidant enzymes, such as the peroxidase, catalase, and superoxide dismutase activities, in the 2013-33 genotype under HS were recorded, being significantly lower than in 'AM160'. Additionally, the expression profile of BrHSF genes was checked and classified to three main groups, (i) HS-induced HSFs expressed in both genotypes ( group I), (ii) suppressed by HS in both genotypes (groupII), and (iii) genotype-specific expression of HSFs (repressed in the AM160 heat-sensitive genotype whereas induced in the '2013-33' heat tolerance genotype; group III). Furthermore, the result of promoter analysis shows that group III BrHSFs, i.e., 23, 30, and 33 gene promoter regions possessed a difference between '2013-33' and 'AM160'. In conclusion, the results of our study identify that '2013-33' had more heat tolerance than 'AM160' because of a higher accumulation of sugar and protein and an enhanced expression of group III HSFs, and the differential response of group III HSFs to HS in these two genotypes may be because of a promoter sequence difference. The study provides us a clue towards understanding the mechanism of heat tolerance in Chinese cabbage and offers a valuable source for further improvement of heat tolerance in Chinese cabbage. Abbreviations: CAT -catalase; Fv/Fm -variable to maximum chlorophyll fluorescence ratio; HSC -heat stress conditions; HSF -heat shock transcriptional factor; MDA -malondialdehyde; NC -normal conditions; POD -peroxidase; PS -photosystem; REC -relative electric conductivity; ROS -reactive oxygen species; SNP -single nucleotide polymorphism; SOD -superoxide dismutase.

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Section: Resultsmentioning

confidence: 99%

Physiological and molecular responses of two Chinese cabbage genotypes to heat stress

Qunyan¹,

Yang²,

Cui³

et al. 2019

Biol. plant.

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“…High temperature, above the optimal growth temperature, is a major stress factor that impacts on the whole life cycle of plants; Ca 2+ , crossing membrane into the cells via Ca 2+ channels, is implicated in the development of heat tolerance in plants (Gong et al, 1997;Wahid et al, 2007;Li et al, 2012;Asthir, 2015;Li H. et al, 2019;Serrano et al, 2019). Recently, the positive effect of Glu in heat tolerance had been found by , who first reported that in maize (Zea mays L.) seedlings treatment with Glu elevated the survival percentage of seedlings under heat stress.…”

Section: Heat Stressmentioning

confidence: 99%

Signaling Role of Glutamate in Plants

et al. 2020

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It is well known that glutamate (Glu), a neurotransmitter in human body, is a protein amino acid. It plays a very important role in plant growth and development. Nowadays, Glu has been found to emerge as signaling role. Under normal conditions, Glu takes part in seed germination, root architecture, pollen germination, and pollen tube growth. Under stress conditions, Glu participates in wound response, pathogen resistance, response and adaptation to abiotic stress (such as salt, cold, heat, and drought), and local stimulation (abiotic or biotic stress)-triggered long distance signaling transduction. In this review, in the light of the current opinion on Glu signaling in plants, the following knowledge was updated and discussed. 1) Glu metabolism; 2) signaling role of Glu in plant growth, development, and response and adaptation to environmental stress; as well as 3) the underlying research directions in the future. The purpose of this review was to look forward to inspiring the rapid development of Glu signaling research in plant biology, particularly in the field of stress biology of plants.

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“…Along with global warming, high temperature has already become a noticeable abiotic stress worldwide, and the mechanisms of high temperature injury and heat tolerance have attracted much attention (Wahid et al, 2007; Asthir, 2015; Hemmati et al, 2015). Christou et al (2011) found that pre-treatment of roots with NaHS effectively alleviated the decrease in leaf chlorophyll fluorescence, stomatal conductance and relative leaf water content in strawberry ( Fragaria x ananassa cv.…”

Section: H2s-induced Cross-adaptationmentioning

confidence: 99%

Hydrogen Sulfide: A Signal Molecule in Plant Cross-Adaptation

2016

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For a long time, hydrogen sulfide (H2S) has been considered as merely a toxic by product of cell metabolism, but nowadays is emerging as a novel gaseous signal molecule, which participates in seed germination, plant growth and development, as well as the acquisition of stress tolerance including cross-adaptation in plants. Cross-adaptation, widely existing in nature, is the phenomenon in which plants expose to a moderate stress can induce the resistance to other stresses. The mechanism of cross-adaptation is involved in a complex signal network consisting of many second messengers such as Ca2+, abscisic acid, hydrogen peroxide and nitric oxide, as well as their crosstalk. The cross-adaptation signaling is commonly triggered by moderate environmental stress or exogenous application of signal molecules or their donors, which in turn induces cross-adaptation by enhancing antioxidant system activity, accumulating osmolytes, synthesizing heat shock proteins, as well as maintaining ion and nutrient balance. In this review, based on the current knowledge on H2S and cross-adaptation in plant biology, H2S homeostasis in plant cells under normal growth conditions; H2S signaling triggered by abiotic stress; and H2S-induced cross-adaptation to heavy metal, salt, drought, cold, heat, and flooding stress were summarized, and concluded that H2S might be a candidate signal molecule in plant cross-adaptation. In addition, future research direction also has been proposed.

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Mechanisms of heat tolerance in crop plants

Cited by 67 publications

References 81 publications

Physiological and molecular responses of two Chinese cabbage genotypes to heat stress

Physiological and molecular responses of two Chinese cabbage genotypes to heat stress

Signaling Role of Glutamate in Plants

Hydrogen Sulfide: A Signal Molecule in Plant Cross-Adaptation

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