High temperature stress mitigation in rice (&lt;em&gt;Oryza sativa&lt;/em&gt; L.): Foliar application of plant growth regulators and nutrients

M, Raghunath; Beena, R.; Mohan, V.; Viji, M. M.; Manju, R; Stephen, R. C.

doi:10.22271/09746315.2021.v17.i1.1404

Cited by 8 publications

(4 citation statements)

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“…The foliar application of nutrients considerably increases the biochemical activity in the leaf as well as the concentration of chlorophyll and carotenoid, which in turn improves the rate of photosynthesis in plants [33]. Our result is in confirmatory with Raghunath et al [34] who observed that foliar spray of both plant growth hormones and nutrients increased photosynthetic rate in rice.…”

Section: Photosynthetic Ratesupporting

confidence: 91%

Enhancing Morpho-Physiological and Yield Potential of Rice using Nutrients and Plant Growth Regulators

Preethi,

Ravichandran,

Prasad

et al. 2023

IJPSS

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Rice (Oryza sativa L.) is one of the major cereals and the staple food crops which is cultivated all over the world. In order to meet the growing demand of population, it is important to increase the productivity of crop. The productivity of crop is influenced by nutrients and growth hormones. With this background, a field experiment was conducted during the month of January-May 2023 at wetland farms, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India to evaluate the effect of different foliar nutrients and growth regulators on growth, physiology, biochemical and yield attributes in rice. The experimental layout was Factorial Randomized Block Design (FRBD) with two varieties (CO55 and ADT 57). The treatments consisted of foliar spray of T1- Control (water spray), T2- Nutrio-hormonal consortia 1, T3- Nutrio-hormonal consortia 2, T4- Rice booster 1 and T5- Rice booster 2 given at the booting stage and 15 days after the first spray. Among the treatments, T5- Rice booster 2 significantly improved leaf area (1813.99 cm2, 2059.78 cm2), leaf area index (4.53, 5.15), crop growth rate (32.07 g/m2/day, 37.89 g/m2/day), chlorophyll index (37.60, 41.73), photosynthetic rate (27.15 µmol CO2 m-2 s-1, 30.04 µmol CO2 m-2 s-1), Transpiration rate (11.83 mmol H2O m-1 s-1, 14.20 mmol H2O m-1 s-1 ), soluble protein content (16.23 mg/g, 17.30 mg/g), nitrate reductase activity (98.15 µg of NO2/g/h, 112.47 µg of NO2/g/h) in ADT- 57 variety at both sprays, respectively. Foliar application of rice booster 2 (T5) resulted in higher number of productive tillers (23), number of spikelets per panicle (165.5), spikelet fertility (95.48%), 1000 grain weight (17.35g), grain yield/ plant (31.40g), grain yield/hectare (6694.32 Kg/ha), harvest index (45.44%) in ADT 57 and resulted in 15% yield increment over the control. Thus the present study concluded that the foliar application of rice booster 2 (T5) significantly improved the growth, physiology, biochemical and yield attributes in rice variety ADT 57.

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Section: Photosynthetic Ratesupporting

confidence: 91%

Enhancing Morpho-Physiological and Yield Potential of Rice using Nutrients and Plant Growth Regulators

Preethi,

Ravichandran,

Prasad

et al. 2023

IJPSS

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“…Crosstalk also occurs between these two components at the aquaporin level ( Li et al., 2020 ). A brassinosteroid (BR) treatment ameliorated the ill-effects of drought stress by improving CO 2 assimilation ( Raghunath et al., 2021 ; Lakshmi et al., 2022 ). The induction of endogenous BR under drought stress might help accumulate carbon.…”

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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“…Spray application of exogenous ABA may regulate stomatal closure in the leaves, induce the expression of responsive genes and the synthesis of endogenous ABA and heat shock proteins, and improve the hightemperature tolerance of plants (Rezaul et al, 2019). Spray application of brassinolide in the middle and late stages of pollen mother cell meiosis increases SOD activity and the contents of proline, soluble sugar, and ABA in florets at the heading stage, improves the high-temperature tolerance of plants at the heading stage, and reduces the decrease in percentage seed set under high-temperature stress at the heading stage (Chen et al, 2021;Raghunath et al, 2021). In addition, spray application of SA (Yang et al, 2022), auxin (Sharma et al, 2018), MP (Yang et al, 2019), and other substances can alleviate high-temperature stress to a certain extent.…”

Section: Chemical Regulation Alleviates High-temperature Damage To Ricementioning

confidence: 99%

Strategies for indica rice adapted to high-temperature stress in the middle and lower reaches of the Yangtze River

Zhang

Feng

et al. 2023

Front. Plant Sci.

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High temperatures caused by climate warming severely affect the grain yield and quality of rice. In this study, the rice cultivars Longliangyou Huazhan (LLYHZ) and Quanliangyou 2118 (QLY2118) were selected as the experimental materials for investigation of an optimal cultivation system under high-temperature treatment. In addition, the heat-resistant cultivar Huanghuazhan (HHZ) and heat-sensitive cultivar Huiliangyou 858 (HLY858) were chosen as the experimental materials to study the effects of exogenous plant growth regulators on heat stress responses under high-temperature treatment. The results showed that mechanical transplanting of carpet seedlings and delayed sowing effectively increased the leaf area index and reduced the canopy temperature of LLYHZ and QLY2118. Furthermore, carpet seedling mechanical transplantation and delayed sowing improved grain yield and quality. Spray application of five plant growth regulators revealed that brassinolide and salicylic acid had the strongest effects on significantly improving antioxidant enzyme activities in the panicle, which would reduce the damage caused by the accumulation of reactive oxygen species and enhance plant tolerance of high-temperature stress. In addition, brassinolide and salicylic acid enhanced the percentage of anther dehiscence and percentage seed set. In this study, a set of simplified eco-friendly cultivation techniques for single-season indica rice adaptation to high-temperature stress was established. These results will be of great importance in alleviating the effects of high-temperature stress on rice production.

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High temperature stress mitigation in rice (<em>Oryza sativa</em> L.): Foliar application of plant growth regulators and nutrients

Cited by 8 publications

References 0 publications

Enhancing Morpho-Physiological and Yield Potential of Rice using Nutrients and Plant Growth Regulators

Enhancing Morpho-Physiological and Yield Potential of Rice using Nutrients and Plant Growth Regulators

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

Strategies for indica rice adapted to high-temperature stress in the middle and lower reaches of the Yangtze River

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