Effect of high temperature stress on seed filling and nutritional quality of rice (&lt;em&gt;Oryza sativa&lt;/em&gt; L.)

Pravallika, K.; Arunkumar, C.; Vijaykumar, A.G.; Beena, R.; Jayalekshmi, V. G.

doi:10.22271/09746315.2020.v16.i2.1310

Cited by 13 publications

(9 citation statements)

References 17 publications

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“…Impact of high temperature on physiological and yield traits were studied in rice (Beena et al, 2018a;Beena et al, 2018b). Pravallika et al, 2020 evaluated the nutritional and seed filling traits in heat tolerant and susceptible rice genotypes. Imaki et al (1982) reported that the time of flowering in rice differed among various cultivars and some cultivars flowered early in the morning.…”

Section: Introductionmentioning

confidence: 99%

Manipulation of Flowering Time to Mitigate High Temperature Stress in Rice (Oryza sativa L.)

Beena

2021

IJARe

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Background: High temperature is an important abiotic stress affecting the productivity of rice. Early morning flowering trait is an escape mechanism from heat. This trait is present in wild rice cultivars. Here we tried to induce early morning flowering trait by the application of methyl jasmonate.Methods: A pot culture experiment was conducted during Rabi, 2017 and 2018 to study the effect of foliar application of methyl jasmonate on high temperature stress (more than 35°C) mitigation in rice was conducted in the Department of Plant Physiology, College of Agriculture, Vellayani during 2017-2019. The variety used was Uma (MO 16). Methyl jasmonate was applied as foliar spray to the spikelet in varying concentration with different time. Physiological observations were taken at 50% flowering stage and yield parameters were taken at harvest stage. Conclusion: There was significant variation for physiological and yield components among treatments. 4mM L-1 methyl jasmonate at 7am treatment exhibited increase in pollen viability, spikelet fertility percentage, yield per plant and 1000 grain weight. Hence, it is found that methyl jasmonate can advance anthesis time and thereby plants can escape from the severity of temperature experiencing at the normal flowering time in rice.

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Section: Introductionmentioning

confidence: 99%

Manipulation of Flowering Time to Mitigate High Temperature Stress in Rice (Oryza sativa L.)

Beena

2021

IJARe

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“…However, amylose, seed protein, and anthocyanin showed reduction under high temperature stress condition. Activity of invertase was reduced under high temperature condition compared to control in all varieties from 15 to 30 days after 50% flowering (Pravallika et al, 2020).…”

Section: Discussionmentioning

confidence: 85%

High temperature induced changes in quality and yield parameters of tomato (Solanum lycopersicum L.) and similarity coefficients among genotypes using SSR markers

Vijayakumar

Shanija

Beena

et al. 2021

Heliyon

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High temperature induced by climatic fluctuations are an important threat for plant growth, development and quality of agricultural produces. Adaptableness to environmental changes generally derives from a large set of genetic traits affecting physio-morphological, biochemical and agronomic parameters. Therefore, the identification of genotypes with higher yield and good quality parameters at high temperatures is becoming increasingly necessary for future breeding programs. Here, we analyzed the performance of different tomato genotypes grown under elevated temperatures in terms of yield and nutritional quality of the fruit. High temperature stress was induced from flower initiation to maturity stage by keeping the pots in a temperature controlled green house facility for 45 days. The quality and yield parameters were taken at the harvesting stage. Starch and soluble sugar concentration in the leaves of tomato genotypes showed significant reduction in its amount under heat stress. Titrable acidity (TA), total soluble solids (TSS) and ascorbic acid content of tomato fruits were highest under high temperature conditions compared to ambient condition but lycopene content decreased with rise in temperature. The yield attributes viz., number of fruits/plant, fruit set %, average fruit weight (g), yield per plant (g/plant) were significantly lower for Arka Saurabh, Arka Rakshak and Pusa Rohini when compared to other genotypes under study. Molecular characterization of selected 22 tomato genotypes were assessed using 25 simple sequence repeat (SSR) markers. Phylogenetic tree was constructed by the unweighted neighbour-joining method (UPGMA) using NTSYSpc cluster analysis software. The Jaccard's similarity matrix was constructed using the SIMQUAL method using UPGMA algorithm in NTSYSpc. Jaccard's similarity matrix among these tomato genotypes ranged from a minimum of 0.22 to a maximum of 1 with an average genetic similarity of 0.67. Hence this study has importance in identifying genotypes that could maintain good quality and higher yield under high temperature condition.

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“…Grain quality is more susceptible to combined stress than yield. High temperature (30°C) inhibited starch metabolism by decreasing starch synthase activity due to thermal denaturation ( Pravallika et al., 2020 ). Reduced grain endosperm starch content is a leading cause of reduced quality and yield in crops subjected to drought and heat ( Worch et al., 2011 ).…”

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

confidence: 99%

“…Abiotic stresses such as heat or temperature stress, submergence, drought, or nutritional deficiency create suboptimal environments ( Jeyasri et al., 2021 ) that impair germination, seedling establishment, vegetative growth, flower initiation, panicle growth, grain filling, and productivity ( Banerjee and Roychoudhury, 2020 ; Beena et al., 2021a ). In rice, these attributes severely compromise crop establishment, growth ( Beena et al., 2021b ; Anie et al., 2022 ; Stephen et al., 2022 ), grain quality, and productivity ( Pravallika et al., 2020 ; Pathak et al., 2021 ). Some abiotic pressures in rice-growing environments spur the development and infection of biotic causal agents, aggravating the losses in productivity ( Narsai and Whelan, 2013 ) and grain quality.…”

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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Effect of high temperature stress on seed filling and nutritional quality of rice (<em>Oryza sativa</em> L.)

Cited by 13 publications

References 17 publications

Manipulation of Flowering Time to Mitigate High Temperature Stress in Rice (Oryza sativa L.)

Manipulation of Flowering Time to Mitigate High Temperature Stress in Rice (Oryza sativa L.)

High temperature induced changes in quality and yield parameters of tomato (Solanum lycopersicum L.) and similarity coefficients among genotypes using SSR markers

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

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