Exogenous application of phytohormones and phytometabolites to plants to alleviate the effects of drought stress

Öztürk, Münir; Ünal, Bengü Türkyılmaz

doi:10.1016/b978-0-323-91883-1.00001-2

Cited by 2 publications

(1 citation statement)

References 115 publications

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“…It serves as a defense mechanism against excessive UV radiation, high temperature, bacterial and fungal diseases, insects, high salt, and low temperature. 42,43 Drought, a major form of abiotic stress, poses substantial challenges to global food security and terrestrial ecosystems' overall health because it adversely affects plant development and crop yield. However, there remains a lack of understanding regarding the molecular and evolutionary mechanisms governing the response of plants to drought stress through cuticular wax.…”

Section: Pearl Millet Heat Stress-specific Kegg Pathwaysmentioning

confidence: 99%

Abiotic stress tolerance in pearl millet: Unraveling molecular mechanisms via transcriptomics

Dhawi

2024

Science Progress

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Pearl millet ( Pennisetum glaucum (L.)) is a vital cereal crop renowned for its ability to thrive in challenging environmental conditions; however, the molecular mechanisms governing its salt stress tolerance remain poorly understood. To address this gap, next-generation RNA sequencing was conducted to compare gene expression patterns in pearl millet seedlings exposed to salt stress with those grown under normal conditions. Our RNA sequencing analysis focused on shoots from 13-day-old pearl millet plants subjected to either salinity stress (150 mmol of NaCl for 3 days) or thermal stress (50°C for 60 s). Of 36,041 genes examined, 17,271 genes with fold changes ranging from 2.2 to 19.6 were successfully identified. Specifically, 2388 genes were differentially upregulated in response to heat stress, whereas 4327 genes were downregulated. Under salt stress conditions, 2013 genes were upregulated and 4221 genes were downregulated. Transcriptomic analysis revealed four common abiotic KEGG pathways that play crucial roles in the response of pearl millet to salt and heat stress: phenylpropanoid biosynthesis, photosynthesis–antenna proteins, photosynthesis, and plant hormone signal transduction. These metabolic pathways are necessary for pearl millet to withstand and adapt to abiotic stresses caused by salt and heat. Moreover, the pearl millet shoot heat stress group showed specific transcriptomics related to KEEG metabolic pathways such as cytochrome P450, cutin, suberine, and wax biosynthesis, zeatin biosynthesis, crocin biosynthesis, ginsenoside biosynthesis, saponin biosynthesis, and biosynthesis of various plant secondary metabolites. In contrast, pearl millet shoots exposed to salinity stress exhibited transcriptomic changes associated with KEEG metabolic pathways related to carbon fixation in photosynthetic organisms, mismatch repair, and nitrogen metabolism. Our findings underscore the remarkable cross-tolerance of pearl millet to simultaneous salt and heat stress, elucidated through the activation of shared abiotic KEGG pathways. This study emphasizes the pivotal role of transcriptomics analysis in unraveling the molecular responses of pearl millet under abiotic stress conditions.

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Section: Pearl Millet Heat Stress-specific Kegg Pathwaysmentioning

confidence: 99%

Abiotic stress tolerance in pearl millet: Unraveling molecular mechanisms via transcriptomics

Dhawi

2024

Science Progress

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Phytohormonal modulation of the drought stress in soybean: outlook, research progress, and cross-talk

Shaffique,

Hussain,

Kang

et al. 2023

Front. Plant Sci.

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Phytohormones play vital roles in stress modulation and enhancing the growth of plants. They interact with one another to produce programmed signaling responses by regulating gene expression. Environmental stress, including drought stress, hampers food and energy security. Drought is abiotic stress that negatively affects the productivity of the crops. Abscisic acid (ABA) acts as a prime controller during an acute transient response that leads to stomatal closure. Under long-term stress conditions, ABA interacts with other hormones, such as jasmonic acid (JA), gibberellins (GAs), salicylic acid (SA), and brassinosteroids (BRs), to promote stomatal closure by regulating genetic expression. Regarding antagonistic approaches, cytokinins (CK) and auxins (IAA) regulate stomatal opening. Exogenous application of phytohormone enhances drought stress tolerance in soybean. Thus, phytohormone-producing microbes have received considerable attention from researchers owing to their ability to enhance drought-stress tolerance and regulate biological processes in plants. The present study was conducted to summarize the role of phytohormones (exogenous and endogenous) and their corresponding microbes in drought stress tolerance in model plant soybean. A total of n=137 relevant studies were collected and reviewed using different research databases.

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Exogenous application of phytohormones and phytometabolites to plants to alleviate the effects of drought stress

Cited by 2 publications

References 115 publications

Abiotic stress tolerance in pearl millet: Unraveling molecular mechanisms via transcriptomics

Abiotic stress tolerance in pearl millet: Unraveling molecular mechanisms via transcriptomics

Phytohormonal modulation of the drought stress in soybean: outlook, research progress, and cross-talk

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