High Temperature Stress Tolerance in Maize (Zea mays L.): Physiological and Molecular Mechanisms

Tiwari, Yogesh Kumar; Yadav, Sushil Kumar

doi:10.1007/s12374-018-0350-x

Cited by 78 publications

(55 citation statements)

References 60 publications

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“…This resulted in the scavenging of H 2 O 2 to reduce oxidative stress. Tiwari and Yadav [ 81 ] reported the importance of the AsA–GSH system in managing redox metabolism under HS in maize. They suggested that the enzymatic and non-enzymatic component of AsA-GSH cycle play a key role in ROS homeostasis in cells, thus minimizing the oxidative stress in plants.…”

Section: Discussionmentioning

confidence: 99%

Nitric Oxide and Hydrogen Sulfide Coordinately Reduce Glucose Sensitivity and Decrease Oxidative Stress via Ascorbate-Glutathione Cycle in Heat-Stressed Wheat (Triticum aestivum L.) Plants

et al. 2021

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The involvement of nitric oxide (NO) and hydrogen sulfide (H2S) in countermanding heat-inhibited photosynthetic features were studied in wheat (Triticum aestivum L.). Heat stress (HS) was employed at 40 °C after establishment for 6 h daily, and then plants were allowed to recover at 25 °C and grown for 30 days. Glucose (Glc) content increased under HS and repressed plant photosynthetic ability, but the application of sodium nitroprusside (SNP, as NO donor) either alone or with sodium hydrosulfide (NaHS, as H2S donor) reduced Glc-mediated photosynthetic suppression by enhancing ascorbate-glutathione (AsA-GSH) metabolism and antioxidant system, which reduced oxidative stress with decreased H2O2 and TBARS content. Oxidative stress reduction or inhibiting Glc repression was maximum with combined SNP and NaHS treatment, which was substantiated by 2-4-carboxyphenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (cPTIO) and hypotaurine (HT), scavengers for NO and H2S, respectively. The scavenge of H2S reduced NO-mediated alleviation of HS suggesting of its downstream action in NO-mediated heat-tolerance. However, a simultaneous decrease of both (NO and H2S) led to higher Glc-mediated repression of photosynthesis and oxidative stress in terms of increased H2O2 content that was comparable to HS plants. Thus, NO and H2S cooperate to enhance photosynthesis under HS by reducing H2O2-induced oxidative stress and excess Glc-mediated photosynthetic suppression.

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Section: Discussionmentioning

confidence: 99%

Nitric Oxide and Hydrogen Sulfide Coordinately Reduce Glucose Sensitivity and Decrease Oxidative Stress via Ascorbate-Glutathione Cycle in Heat-Stressed Wheat (Triticum aestivum L.) Plants

et al. 2021

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“…We observed that the decrease in photosynthesis caused by HT was accompanied by damage to the chloroplast and other organellar structures (Figure 4). Structural damage takes a long time to repair or may be irreparable, and damaged leaves cannot be replaced by newly grown leaves after Mathur et al, 2018;Ruiz-Vera et al, 2015;Sinsawat et al, 2004;Tiwari & Yadav, 2019;Yang, Huang, et al, 2017;Yang, Ma, et al, 2017). However, the detailed mechanism of HT damage to the photosynthetic apparatus in maize leaves has not been analysed systematically under field conditions.…”

Section: Discussionmentioning

confidence: 99%

“…Development of endosperm cells is reportedly affected by HT stress (Commuri & Jones, 1999;Engelen-Eigles, Jones, & Phillips, 2000). HT was thought to damage maize reproductive organs and thereby decrease yield (Tiwari & Yadav, 2019;Yadav et al, 2016). However, recent research suggests a relatively minor impact of direct HT stress on reproductive organs (Lobell et al, 2013).…”

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confidence: 99%

High temperature reduces photosynthesis in maize leaves by damaging chloroplast ultrastructure and photosystem II

Ren

et al. 2020

J Agronomy Crop Science

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Global warming has increased the frequency and duration of high temperature (HT) stress. Photosynthesis determines yield in maize and is extremely HT sensitive. The effects of HT on photosynthesis in maize leaves have been strongly examined under controlled conditions. Here, to explore the mechanism and primary inhibitory sites of HT to photosynthesis, the HT sensitivity of photosynthesis in XY335 and ZD958 maize hybrids was systematically studied in field by multiple methods. HT decreased leaf area and photosynthetic rate of unit leaf area and hence limited growth. HT disrupted chloroplast and mitochondrial membrane structure, possibly delaying photosynthetic recovery after HT. These changes were greater in XY335 than ZD958. Stomatal conductance decreased significantly under HT, and this did not restrict CO2 fixation but may weaken the heat dissipation through transpiration. HT caused photoinhibition of PSII but not PSI. HT damaged both the oxygen‐evolving complex, located at donor side of PSII, and electron transfer from QA to QB, located at acceptor side of PSII. Interference of electron transfer from QA to QB caused by degradation of QB‐binding (D1) protein was the primary site of PSII inhibition by HT in maize leaves. The different stomatal behaviour and photoinhibition sites under HT between maize and wheat were discussed.

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“…Maize ranks third behind wheat and rice as a staple cereal crop worldwide [ 1 ]. In terms of yield, it is one of the most productive grain crops.…”

Section: Introductionmentioning

confidence: 99%

Genome-Wide Development and Validation of Cost-Effective KASP Marker Assays for Genetic Dissection of Heat Stress Tolerance in Maize

Jagtap

Vikal

Johal

2020

IJMS

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Maize is the third most important cereal crop worldwide. However, its production is vulnerable to heat stress, which is expected to become more and more severe in coming years. Germplasm resilient to heat stress has been identified, but its underlying genetic basis remains poorly understood. Genomic mapping technologies can fill the void, provided robust markers are available to tease apart the genotype-phenotype relationship. In the present investigation, we used data from an RNA-seq experiment to identify single nucleotide polymorphisms (SNPs) between two contrasting lines, LM11 and CML25, sensitive and tolerant to heat stress, respectively. The libraries for RNA-seq were made following heat stress treatment from three separate tissues/organs, comprising the top leaf, ovule, and pollen, all of which are highly vulnerable to damage by heat stress. The single nucleotide variants (SNVs) calling used STAR mapper and GATK caller pipelines in a combined approach to identify highly accurate SNPs between the two lines. A total of 554,423, 410,698, and 596,868 SNVs were discovered between LM11 and CML25 after comparing the transcript sequence reads from the leaf, pollen, and ovule libraries, respectively. Hundreds of these SNPs were then selected to develop into genome-wide Kompetitive Allele-Specific PCR (KASP) markers, which were validated to be robust with a successful SNP conversion rate of 71%. Subsequently, these KASP markers were used to effectively genotype an F2 mapping population derived from a cross of LM11 and CML25. Being highly cost-effective, these KASP markers provide a reliable molecular marker toolkit to not only facilitate the genetic dissection of the trait of heat stress tolerance but also to accelerate the breeding of heat-resilient maize by marker-assisted selection (MAS).

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High Temperature Stress Tolerance in Maize (Zea mays L.): Physiological and Molecular Mechanisms

Cited by 78 publications

References 60 publications

Nitric Oxide and Hydrogen Sulfide Coordinately Reduce Glucose Sensitivity and Decrease Oxidative Stress via Ascorbate-Glutathione Cycle in Heat-Stressed Wheat (Triticum aestivum L.) Plants

Nitric Oxide and Hydrogen Sulfide Coordinately Reduce Glucose Sensitivity and Decrease Oxidative Stress via Ascorbate-Glutathione Cycle in Heat-Stressed Wheat (Triticum aestivum L.) Plants

High temperature reduces photosynthesis in maize leaves by damaging chloroplast ultrastructure and photosystem II

Genome-Wide Development and Validation of Cost-Effective KASP Marker Assays for Genetic Dissection of Heat Stress Tolerance in Maize

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