Root anatomical traits influence water stress tolerance in rice (Oryza sativa L.)

Manikanta, Chennamsetti Lakshmi Naga; Beena, R.; Rejeth, R

doi:10.1007/s12892-022-00142-8

Cited by 9 publications

(5 citation statements)

References 47 publications

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“…Overexpressing OsNAC10 in the roots was reported to increase yield under drought and to be related to both wholeroot and stele cross sectional size (Jeong et al, 2010). In a study conducted by Manikanta et al (2022), drought tolerant lines N22, Karuthamodan and Chuvannamodan had increase in stele diameter, late metaxylem diameter and late metaxylem number whereas the susceptible lines Annapoorna, Jyothi and Swetha showed decreases in those root anatomical phenotypes. Kadam et al (2015) concluded that the lack of variation in rice root anatomical phenotypes such as stele diameter may explain the poor productivity of rice under drought as compared to wheat, and they did not find differences in root, stele, or xylem diameter in rice response to drought stress, although the drought-tolerant variety N22 showed increased stele diameter near the root apex.…”

Section: Discussionmentioning

confidence: 99%

“…Overexpressing OsNAC10 in the roots was reported to increase yield under drought and to be related to both whole-root and stele cross sectional size ( Jeong et al., 2010 ). In a study conducted by Manikanta et al. (2022) , drought tolerant lines N22, Karuthamodan and Chuvannamodan had increase in stele diameter, late metaxylem diameter and late metaxylem number whereas the susceptible lines Annapoorna, Jyothi and Swetha showed decreases in those root anatomical phenotypes.…”

Section: Discussionmentioning

confidence: 99%

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Response of Southeast Asian rice root architecture and anatomy phenotypes to drought stress

Siangliw

Thunnom²,

Natividad³

et al. 2022

Front. Plant Sci.

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Drought stress in Southeast Asia greatly affects rice production, and the rice root system plays a substantial role in avoiding drought stress. In this study, we examined the phenotypic and genetic correlations among root anatomical, morphological, and agronomic phenotypes over multiple field seasons. A set of >200 rice accessions from Southeast Asia (a subset of the 3000 Rice Genomes Project) was characterized with the aim to identify root morphological and anatomical phenotypes related to productivity under drought stress. Drought stress resulted in slight increases in the basal metaxylem and stele diameter of nodal roots. Although few direct correlations between root phenotypes and grain yield were identified, biomass was consistently positively correlated with crown root number and negatively correlated with stele diameter. The accessions with highest grain yield were characterized by higher crown root numbers and median metaxylem diameter and smaller stele diameter. Genome-wide association study (GWAS) revealed 162 and 210 significant SNPs associated with root phenotypes in the two seasons which resulted in identification of 59 candidate genes related to root development. The gene OsRSL3 was found in a QTL region for median metaxylem diameter. Four SNPs in OsRSL3 were found that caused amino acid changes and significantly associated with the root phenotype. Based on the haplotype analysis for median metaxylem diameter, the rice accessions studied were classified into five allele combinations in order to identify the most favorable haplotypes. The candidate genes and favorable haplotypes provide information useful for the genetic improvement of root phenotypes under drought stress.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Response of Southeast Asian rice root architecture and anatomy phenotypes to drought stress

Siangliw

Thunnom²,

Natividad³

et al. 2022

Front. Plant Sci.

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“…Many paddy growers experience frequent crop failure, resulting in unprecedented hardships such as starvation and financial pressure ( Rejeth et al., 2020 ). Exposure to multiple abiotic stresses leads to physical and biochemical alterations in crop produce ( Manikanta et al., 2020 ; Ali et al., 2022 ; Manikanta et al., 2022 ). Concurrent abiotic stresses damage rice crops more than individual stresses ( Pandey et al., 2017 ), posing various physiological effects that trigger cross-talk reactions that affect rice phenology ( Ramu et al., 2016 ; Ali et al., 2022 ).…”

Section: Introductionmentioning

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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“…It is projected that by 2050, more than half of the world's agricultural land will be affected by drought (Zia et al, 2021). Rice is prone to water stress because it possesses swift stomatal closure, thin cuticular wax, and a small root system (Manikanta et al, 2022). Due to the drought-induced stress, global rice yield loss was estimated to be USD37 million, which is approximately 34% of the overall rice production (Hosseinifard et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Drought Impacts and the Tolerance Mechanisms in Rice (Oryza sativa L.): A Review

Oyebamiji

Shamsudin²,

Ikmal³

et al. 2022

Egypt. J. Agron.

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Egyptian Journal of Agronomy http://agro.journals.ekb.eg/ Review 9 R ICE (Oryza sativa L.) is considered the major source of calories for more than half of the world's population. However, this Asian staple crop is susceptible to abiotic stress, including drought, throughout its life cycle. The main theme covered in this review includes types of drought and its effects on rice morphological, physiological, biochemical, and agronomical levels and their adaptive mechanisms under drought. Drought in the rainfed ecosystem during critical stages (germination and reproductive stages) has seriously undermined rice production, posing a danger to global food supply and sustainable food production worldwide. It caused a reduction in the germination rate, CO 2 assimilation rate, photosynthesis activities, gas exchange via the leaf, plant height, number of panicles, seed weight, biomass, harvest index, and yield. Delayed seed germination, flowering, and maturity of the rice plant are also associated with water stress. Under mild or adverse drought conditions, plants exhibit certain adaptive changes or tolerance mechanisms, including activating antioxidant systems and the production of osmolytes such as proline and polyamine, subsequently enhancing drought tolerance. The role of phytohormones in alleviating stress has been recognized and highlighted in this review. Furthermore, the plant root system also plays a significant role in drought. The information provided in this review will help researchers to have comprehensive knowledge and understanding of the changes and disruptions that occur in rice during water stress and its tolerance mechanisms, subsequently facilitating the selection and development of droughttolerant rice.

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Root anatomical traits influence water stress tolerance in rice (Oryza sativa L.)

Cited by 9 publications

References 47 publications

Response of Southeast Asian rice root architecture and anatomy phenotypes to drought stress

Response of Southeast Asian rice root architecture and anatomy phenotypes to drought stress

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

Drought Impacts and the Tolerance Mechanisms in Rice (Oryza sativa L.): A Review

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