Physiological and molecular signatures reveal differential response of rice genotypes to drought and drought combination with heat and salinity stress

Yadav, Chhaya; Bahuguna, Rajeev Nayan; Dhankher, Om Parkash; Singla‐Pareek, Sneh L.; Pareek, Ashwani

doi:10.1007/s12298-022-01162-y

Cited by 17 publications

(17 citation statements)

References 86 publications

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“…Several phenotyping protocols were developed to screen seedlings for salt tolerance in rice, wheat, and barley; tolerance is determined by performance morphological comparisons against known salt‐tolerant genotypes (Bado et al, 2016). In recent years, comparative analysis of contrasting genotypes has proven an efficacious approach for finding genes associated with plant salinity tolerance (Kumari, Nee Sabharwal, et al, 2009; Soda et al, 2013; Yadav et al, 2022). Salt exclusion from plant leaves was suggested to be the essential mechanism for tolerance in cereal crops undertaken at the early seedling stage.…”

Section: Effect Of Salinity At Seedling Stage Of Ricementioning

confidence: 99%

Seedling‐stage salinity tolerance in rice: Decoding the role of transcription factors

Tiwari

Nutan

Deshmukh

et al. 2022

Physiologia Plantarum

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Rice is an important staple food crop that feeds over half of the human population, particularly in developing countries. Increasing salinity is a major challenge for continuing rice production. Though rice is affected by salinity at all the developmental stages, it is most sensitive at the early seedling stage. The yield thus depends on how many seedlings can withstand saline water at the stage of transplantation, especially in coastal farms. The rapid development of “omics” approaches has assisted researchers in identifying biological molecules that are responsive to salt stress. Several salinity‐responsive quantitative trait loci (QTL) contributing to salinity tolerance have been identified and validated, making it essential to narrow down the search for the key genes within QTLs. Owing to the impressive progress of molecular tools, it is now clear that the response of plants toward salinity is highly complex, involving multiple genes, with a specific role assigned to the repertoire of transcription factors (TF). Targeting the TFs for improving salinity tolerance can have an inbuilt advantage of influencing multiple downstream genes, which in turn can contribute toward tolerance to multiple stresses. This is the first comparative study for TF‐driven salinity tolerance in contrasting rice cultivars at the seedling stage that shows how tolerant genotypes behave differently than sensitive ones in terms of stress tolerance. Understanding the complexity of salt‐responsive TF networks at the seedling stage will be helpful to alleviate crop resilience and prevent crop damage at an early growth stage in rice.

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Section: Effect Of Salinity At Seedling Stage Of Ricementioning

confidence: 99%

Seedling‐stage salinity tolerance in rice: Decoding the role of transcription factors

Tiwari

Nutan

Deshmukh

et al. 2022

Physiologia Plantarum

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“…In general, the effect of stress combinations on growth traits and electrolyte leakage was significantly higher across the genotypes as compared to individual stresses (Figure 2). It has been reported previously that stress combinations are generally more detrimental to growth and yield (Mittler, 2006;Suzuki et al, 2014;Yadav et al, 2022). Previous studies demonstrated that the ability to avoid stress, such as HT by transpirational cooling and water deficit by stomatal closure, may not be effective under stress combination (e.g.…”

Section: Genetic Response To Individual and Stress Combinationmentioning

confidence: 99%

Impact of individual, combined and sequential stress on photosynthesis machinery in rice (Oryza sativa L)

Anwar,

Joshi,

Bahuguna

et al. 2024

Physiologia Plantarum

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Abiotic stresses such as heat, drought and submergence are major threats to global food security. Despite simultaneous or sequential occurrence of these stresses being recurrent under field conditions, crop response to such stress combinations is poorly understood. Rice is a staple food crop for the majority of human beings. Exploitation of existing genetic diversity in rice for combined and/or sequential stress is a useful approach for developing climate‐resilient cultivars. We phenotyped ~400 rice accessions under high temperature, drought, or submergence and their combinations. A cumulative performance index revealed Lomello as the best performer across stress and stress combinations at the seedling stage. Lomello showed a remarkable ability to maintain a higher quantum yield of photosystem (PS) II photochemistry. Moreover, the structural integrity of the photosystems, electron flow through both PSI and PSII and the ability to protect photosystems against photoinhibition were identified as the key traits of Lomello across the stress environments. A higher membrane stability and an increased amount of leaf chlorophyll under stress may be due to an efficient management of reactive oxygen species (ROS) at the cellular level. Further, an efficient electron flow through the photosystems and, thus, a higher photosynthetic rate in Lomello is expected to act as a sink for ROS by reducing the rate of electron transport to the high amount of molecular oxygen present in the chloroplast. However, further studies are needed to identify the molecular mechanism(s) involved in the stability of photosynthetic machinery and stress management in Lomello during stress conditions.

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“…Salinity and drought stress disrupt morphological features and physiological and biochemical processes in rice. While these stresses have their respective domains and scopes, drought and salinity stress often co-occur in natural field environments ( Fan et al., 2015 ; Paul et al., 2019 ; Yadav et al., 2022 ). The severity and occurrence of combined drought and salinity stress are expected to increase with global environmental changes, which could have profound implications on the food supply.…”

Section: Physiological and Molecular Implications Of Combined Abiotic...mentioning

confidence: 99%

Physiological and molecular implications of multiple abiotic stresses on yield and quality of rice

et al. 2023

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Abiotic stresses adversely affect rice yield and productivity, especially under the changing climatic scenario. Exposure to multiple abiotic stresses acting together aggravates these effects. The projected increase in global temperatures, rainfall variability, and salinity will increase the frequency and intensity of multiple abiotic stresses. These abiotic stresses affect paddy physiology and deteriorate grain quality, especially milling quality and cooking characteristics. Understanding the molecular and physiological mechanisms behind grain quality reduction under multiple abiotic stresses is needed to breed cultivars that can tolerate multiple abiotic stresses. This review summarizes the combined effect of various stresses on rice physiology, focusing on grain quality parameters and yield traits, and discusses strategies for improving grain quality parameters using high-throughput phenotyping with omics approaches.

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Physiological and molecular signatures reveal differential response of rice genotypes to drought and drought combination with heat and salinity stress

Cited by 17 publications

References 86 publications

Seedling‐stage salinity tolerance in rice: Decoding the role of transcription factors

Seedling‐stage salinity tolerance in rice: Decoding the role of transcription factors

Impact of individual, combined and sequential stress on photosynthesis machinery in rice (Oryza sativa L)

Physiological and molecular implications of multiple abiotic stresses on yield and quality of rice

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