High-temperature stress susceptibility of representative japonica rice cultivars derived from Norin-22: Inadequate ATP supply during seed development may lead to severe damage

High temperature during the crop growing period is detrimental as it results in reduction of yield. A diverse set of rice germplasm consisting of 60 genotypes was grown at two different sowing times (normal and late) and were exposed naturally to high temperature in the late sown condition (stress). There was a severe reduction in grain yield and spikelet fertility in all the genotypes in the late sown crop. Yield based indices were computed based on grain yield recorded under normal and stress conditions. Indices Stress Susceptibility Index (STI), Geometric Mean Production (GMP), Mean Production (MP), Yield Index (YI), Modified stress tolerance (K1STI and K2STI) were positively correlated with yield recorded under both normal and high temperature stress condition and can be considered as suitable indices for screening of rice genotypes under high temperature conditions. Ranking genotypes based on the indices revealed that Rasi, HKR47, IR64, Khudaridhan, Akshayadhan and N22 exhibited the highest mean rank and hence they can be identified as heat-tolerant genotypes. ADT43, Vandana, IR36, MTU1001, ADT49 and Krishnahamsa had a lower rank and were identified as susceptible genotypes to high-temperature stress.

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Sensitive stages of fruit and seed development of chili pepper (Capsicum annuum L. var. Shishito) exposed to high-temperature stress

Scientia Horticulturae ◽

10.1016/j.scienta.2008.03.017 ◽

2008 ◽

Vol 117 (1) ◽

pp. 21-25 ◽

Cited By ~ 28

Author(s):

P. Pagamas ◽

E. Nawata

Keyword(s):

High Temperature ◽

Capsicum Annuum ◽

Seed Development ◽

Temperature Stress ◽

High Temperature Stress ◽

Chili Pepper ◽

Capsicum Annuum L

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Exogenous spermidine enhances the photosynthetic and antioxidant capacity of rice under heat stress during early grain-filling period

Functional Plant Biology ◽

10.1071/fp17149 ◽

2018 ◽

Vol 45 (9) ◽

pp. 911 ◽

Cited By ~ 15

Author(s):

She Tang ◽

Haixiang Zhang ◽

Ling Li ◽

Xia Liu ◽

Lin Chen ◽

...

Keyword(s):

High Temperature ◽

Antioxidant Capacity ◽

Temperature Stress ◽

Soluble Sugars ◽

High Temperature Stress ◽

Temperature Treatment ◽

High Temperature Treatment ◽

Japonica Rice ◽

Rice Varieties ◽

Fluorescence Maximum

High temperature has adverse effects on rice growth by inhibiting the flag leaf photosynthetic and antioxidant capacity, which can be alleviated by various exogenous chemicals such as spermidine (Spd). However, the role of Spd in conferring heat tolerance in rice is not well documented. Conventional japonica rice varieties Wuyunjing 24 and Ningjing 3 were treated with high temperatures at 37.5/27.0°C (day/night) and foliar sprayed with 1 mmol L−1 Spd after flowering. Results showed activities of superoxide dismutase (SOD) and peroxidase (POD) activities were deceased during high temperature treatment and eventually lead to the malondialdehyde (MDA) accumulation. Exogenous Spd significantly increased both SOD and POD activities at the later stage of high-temperature treatment, and reduced MDA accumulation were identified in both rice varieties. Application of Spd further increased the amount of soluble sugars during high temperature stress and that maintained the osmotic equilibrium of rice leaves. Spd significantly increased photosystem II (ΦPSII), photosynthetic electron transport rate (ETR), variable fluorescence/maximum fluorescence ratio (Fvʹ/Fmʹ), stomatal conductance and the photochemical reaction of light energy ratio (Pr), and ultimately improved the photosynthetic and transpiration rate during high temperature stress. In conclusion, exogenous Spd can effectively alleviate the adverse consequences of high temperature and could be further applied to provide strategies in mitigating the challenges of global warming-induced yield loss and other possible relevant issues.

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Effect of high temperature stress during ripening on the accumulation of key storage compounds among Japanese highly palatable rice cultivars

Journal of Cereal Science ◽

10.1016/j.jcs.2020.103018 ◽

2020 ◽

Vol 95 ◽

pp. 103018

Author(s):

Tsutomu Ishimaru ◽

Masayuki Miyazaki ◽

Takanari Shigemitsu ◽

Masaru Nakata ◽

Masaharu Kuroda ◽

...

Keyword(s):

High Temperature ◽

Temperature Stress ◽

High Temperature Stress ◽

Rice Cultivars ◽

Storage Compounds

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Reduced rice grain production under high-temperature stress closely correlates with ATP shortage during seed development

Plant Biotechnology ◽

10.5511/plantbiotechnology.27.67 ◽

2010 ◽

Vol 27 (1) ◽

pp. 67-73 ◽

Cited By ~ 8

Author(s):

Kao-Chih She ◽

Hiroaki Kusano ◽

Mitsuhiro Yaeshima ◽

Tadamasa Sasaki ◽

Hikaru Satoh ◽

...

Keyword(s):

High Temperature ◽

Seed Development ◽

Temperature Stress ◽

High Temperature Stress ◽

Rice Grain ◽

Grain Production

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Identification of stress indices for screening of rice cultivars under high temperature

INTERNATIONAL JOURNAL OF AGRICULTURAL SCIENCES ◽

10.15740/has/ijas/17-aaebssd/266-272 ◽

2021 ◽

Vol 17 (AAEBSSD) ◽

pp. 266-272

Author(s):

N. Veronica ◽

T. Sujatha ◽

P.V. Ramana Rao

Keyword(s):

High Temperature ◽

Temperature Stress ◽

Geometric Mean ◽

High Temperature Stress ◽

Stress Conditions ◽

Abiotic And Biotic Stresses ◽

Biotic Stresses ◽

Calculated Stress ◽

Selection Indices ◽

Stress Susceptibility

Rice is an important cereal crop and its productivity is being affected by many abiotic and biotic stresses. High temperature affects the rice yield and productivity. Thirty rice genotypes were evaluated in normal and under high temperature stress conditions. There was reduction in grain yield in all the tested genotypes. Based on yield recorded under normal and high temperature conditions, yield based indices were calculated. Stress Susceptibility Index (SSI), Geometric Mean Production (GMP), Mean Production (MP), Yield Index (YI), Modified stress tolerance (K1STI and K2STI) were significantly and positively correlated to yield under both stress and non-stress conditions and could be considered as good selection indices for screening for heat tolerance. Genotypes were ranked based on their tolerant or susceptibility indices and it was noted that among all IET 28412, IET 28397 and IET 28432 exhibited highest mean rank and a lower standard deviation of rank, hence they can be identified as heat tolerant genotypes. Genotypes IET 26468, IET 28393 and Gontrabidhan-3 were identified as highly susceptible to high temperature stress.

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