Association between ABA-and drought-mediated regulation of root traits and identification of potential SNPs in genes for root development in rice

Krishna, Gopal; Vishwakarma, Chandrapal; Thomas, Paulson; Aravind, J.; Kushwaha, Sitaram; Chinnusamy, Viswanathan

doi:10.5958/0975-6906.2018.00006.8

Cited by 5 publications

(2 citation statements)

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“…In wheat root, ABA regulates the premature differentiation of root apical meristem under drought [ 155 ]. Several rice genotypes also exhibit enhancement or stability in root length in response to ABA treatment [ 156 ]. ABA also regulates ROS generation and thus directs the protection of plant tissues from oxidative damage under stress conditions [ 157 ].…”

Section: Roles Of Aba In Crop Roots Under Droughtmentioning

confidence: 99%

Crop Root Responses to Drought Stress: Molecular Mechanisms, Nutrient Regulations, and Interactions with Microorganisms in the Rhizosphere

Kang

Peng

2022

IJMS

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Roots play important roles in determining crop development under drought. Under such conditions, the molecular mechanisms underlying key responses and interactions with the rhizosphere in crop roots remain limited compared with model species such as Arabidopsis. This article reviews the molecular mechanisms of the morphological, physiological, and metabolic responses to drought stress in typical crop roots, along with the regulation of soil nutrients and microorganisms to these responses. Firstly, we summarize how root growth and architecture are regulated by essential genes and metabolic processes under water-deficit conditions. Secondly, the functions of the fundamental plant hormone, abscisic acid, on regulating crop root growth under drought are highlighted. Moreover, we discuss how the responses of crop roots to altered water status are impacted by nutrients, and vice versa. Finally, this article explores current knowledge of the feedback between plant and soil microbial responses to drought and the manipulation of rhizosphere microbes for improving the resilience of crop production to water stress. Through these insights, we conclude that to gain a more comprehensive understanding of drought adaption mechanisms in crop roots, future studies should have a network view, linking key responses of roots with environmental factors.

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Section: Roles Of Aba In Crop Roots Under Droughtmentioning

confidence: 99%

Crop Root Responses to Drought Stress: Molecular Mechanisms, Nutrient Regulations, and Interactions with Microorganisms in the Rhizosphere

Kang

Peng

2022

IJMS

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“…Sahbhagi Dhan, a variety released for drought conditions, was categorized as shallow to medium rooting. Sahbhagi Dhan has high adaptability to its environment (Krishna et al (2018).…”

Section: Resultsmentioning

confidence: 99%

A facile and cheaper method to measure root angle of rice and wheat

Sakhare

Kumar

et al. 2019

Indian J Agri Sci

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Genetic improvement in root system architecture (RSA) is an important trait to achieve stability of grain yield in water-deficit stress environments. Deep rooting is a major component trait that contributes to dehydration avoidance under drought in most crops. Due to the difficulty in the phenotyping for deep rooting, genetic variability in deep rooting is less exploited in genetic improvement programme. Root angle is a surrogate for deep rooting. Here, we report a novel method to measure root angle which is easy, robust and cheaper. By using this method, 56 wheat and 29 rice genotypes were phenotyped for root angle under field conditions. Wide variability in root angle was observed among rice and wheat genotypes. In rice, about 58% of crown roots were having shallow angle (<40Â°), while in wheat, about 67% of the crown roots were in deep rooting angle (>60Â°). This method could categorize the previously known shallow rooted rice cv. IR6 4 in to shallow root category with >90% of its crown root with an angle of <40Â°. Among the rice genotypes, BAM 2574, produced >60% of crown roots with >60Â° and identified as deep-rooted genotype. In wheat CL 3791, CL 3817 and CL 3823 were identified as deep-rooted genotypes. This method issuitable for high throughput phenotyping of root angle in natural field conditions.

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