Expression of AtGA2ox1 enhances drought tolerance in maize

Chen, Ziqi; Liu, Yang; Yin, Yuejia; Liu, Qing; Li, Nan; Li, Xia; He, Wei; Hao, Dongyun; Liu, Xiangguo; Guo, Changhong

doi:10.1007/s10725-019-00526-x

Cited by 31 publications

(19 citation statements)

References 53 publications

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Section: Gibberellinmentioning

confidence: 91%

“…The gibberellins or gibberellic acids (GAs) are tetracyclic diterpenoid carboxylic acids that act as a plant growth regulator (PGR) and respond to various stresses, including DS. They work throughout a plant's life span, from seedling to flowering or full maturity (Chen et al, 2019, Nir et al, 2014, Shi et al, 2019). There have been reports of plant growth sensitivity in response to GAs.…”

Section: Phytohormones: Important Plant Mediators To Cope With Drought Stressmentioning

confidence: 99%

“…Transgenic plants also show higher Chl contents and enhanced germination rate compared to WT plants under DS. Transgenic plants increased the DT by increasing antioxidant defense enzymes' activities, enhanced proline, and soluble sugar contents, and decreased MDA level compared to WT (Chen et al, 2019). In another study, GhGAox1 was OE in transgenic cotton than non‐transgenic plants, which led to larger leaf area, root length and stem elongation under drought and salt stress.…”

Section: Phytohormones: Important Plant Mediators To Cope With Drought Stressmentioning

confidence: 99%

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A manipulative interplay between positive and negative regulators of phytohormones: A way forward for improving drought tolerance in plants

Mubarik

Khan

Sajjad

et al. 2021

Physiologia Plantarum

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Section: Gibberellinmentioning

confidence: 91%

Section: Phytohormones: Important Plant Mediators To Cope With Drought Stressmentioning

confidence: 99%

Section: Phytohormones: Important Plant Mediators To Cope With Drought Stressmentioning

confidence: 99%

See 1 more Smart Citation

A manipulative interplay between positive and negative regulators of phytohormones: A way forward for improving drought tolerance in plants

Mubarik

Khan

Sajjad

et al. 2021

Physiologia Plantarum

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“…We conclude this gene may play an important role in ROS detoxification enzyme activity under drought stress [ 75 ]. Zm00001d003797 , which was associated with CDW ( Ferredoxin-3 chloroplastic ), is a specific drought-responsive protein of the Sorghum bicolor genotype, RTx430 (preflowering drought-tolerant genotype), and is involved in the production of ROS scavenging ferredoxins, a mechanism of drought tolerance [ 76 ]. Zm00001d037079 , which was associated with CL/RL, was down-regulated at the third leaf stage after waterlogging for 6 days [ 77 ].…”

Section: Discussionmentioning

confidence: 99%

Genetics of Germination and Seedling Traits under Drought Stress in a MAGIC Population of Maize

Rida

Maafi

Lozano

et al. 2021

Plants

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Drought is one of the most detrimental abiotic stresses hampering seed germination, development, and productivity. Maize is more sensitive to drought than other cereals, especially at seedling stage. Our objective was to study genetic regulation of drought tolerance at germination and during seedling growth in maize. We evaluated 420 RIL with their parents from a multi-parent advanced generation inter-cross (MAGIC) population with PEG-induced drought at germination and seedling establishment. A genome-wide association study (GWAS) was carried out to identify genomic regions associated with drought tolerance. GWAS identified 28 and 16 SNPs significantly associated with germination and seedling traits under stress and well-watered conditions, respectively. Among the SNPs detected, two SNPs had significant associations with several traits with high positive correlations, suggesting a pleiotropic genetic control. Other SNPs were located in regions that harbored major QTLs in previous studies, and co-located with QTLs for cold tolerance previously published for this MAGIC population. The genomic regions comprised several candidate genes related to stresses and plant development. These included numerous drought-responsive genes and transcription factors implicated in germination, seedling traits, and drought tolerance. The current analyses provide information and tools for subsequent studies and breeding programs for improving drought tolerance.

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“…Genes encoding enzymes that inactivate GAs, GA2oxs, are induced by various hormones and abiotic stresses including methyl jasmonate (GA2ox3 and GA2ox4), ABA (GA2ox6 and GA2ox7), osmotic, and salt stress (GA2ox) [103]. Decreasing active GA levels by overexpressing GA2oxs in tobacco and maize conferred an enhanced drought tolerance [104,105]. Interestingly, GA2ox8, which is expressed in stomata, is suppressed by ABA, and when overexpressed in Arabidopsis conferred drought tolerance [103].…”

Section: Analysis Of Hormone-related Genes Differentially Regulated During Heat/drought Stressmentioning

confidence: 99%

Transcriptome Analysis of Lolium temulentum Exposed to a Combination of Drought and Heat Stress

Martin

Kronmiller

Dombrowski

2021

Plants

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Drought and heat are two major stresses predicted to increase in the future due to climate change. Plants exposed to multiple stressors elicit unique responses from those observed under individual stresses. A comparative transcriptome analysis of Lolium temulentum exposed to drought plus heat and non-stressed control plants revealed 20,221 unique up-regulated and 17,034 unique down-regulated differentially regulated transcripts. Gene ontology analysis revealed a strong emphasis on transcriptional regulation, protein folding, cell cycle/parts, organelles, binding, transport, signaling, oxidoreductase, and antioxidant activity. Differentially expressed genes (DEGs) encoding for transcriptional control proteins such as basic leucine zipper, APETALA2/Ethylene Responsive Factor, NAC, and WRKY transcription factors, and Zinc Finger (CCCH type and others) proteins were more often up-regulated, while DEGs encoding Basic Helix-Loop-Helix, MYB and GATA transcription factors, and C2H2 type Zinc Finger proteins were more often down-regulated. The DEGs encoding heat shock transcription factors were only up-regulated. Of the hormones, auxin-related DEGs were the most prevalent, encoding for auxin response factors, binding proteins, and efflux/influx carriers. Gibberellin-, cytokinin- and ABA-related DEGs were also prevalent, with fewer DEGs related to jasmonates and brassinosteroids. Knowledge of genes/pathways that grasses use to respond to the combination of heat/drought will be useful in developing multi-stress resistant grasses.

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Expression of AtGA2ox1 enhances drought tolerance in maize

Cited by 31 publications

References 53 publications

A manipulative interplay between positive and negative regulators of phytohormones: A way forward for improving drought tolerance in plants

A manipulative interplay between positive and negative regulators of phytohormones: A way forward for improving drought tolerance in plants

Genetics of Germination and Seedling Traits under Drought Stress in a MAGIC Population of Maize

Transcriptome Analysis of Lolium temulentum Exposed to a Combination of Drought and Heat Stress

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