Morpho-physiological and phenological response of rice (Oryza sativa L.) genotypes to low temperature stress at reproductive stage
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Published:2023-06-30
Issue:1
Volume:4
Page:53-61
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ISSN:2582-8053
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Container-title:International Journal of Agricultural and Applied Sciences
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language:
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Short-container-title:IJAAS
Author:
Begum YasmeenORCID, , Patil R. P., Meena M. K., Mahantashivayogayya K., Suma T. C., Lakshmikanth M., , , , ,
Abstract
The yearly changes in atmospheric temperature are projected to negatively affect food production in several locations. Rice exposure to low-temperature stress can decrease plant growth in different stages, notably during the reproductive period. A field experiment was conducted in ARS Gangavathi, Karnataka. The experiment laid out in factorial randomized block design where four different rice genotypes (GNV-10-89, GNV-1801, GNV-1108 and BPT-5204) transplanted under two different dates of transplanting D1 (normal Kharif-15th September) and D2 (late Kharif-30th September). The low temperature during the reproductive stage was 14.1°C which inhibited the morphological, physiological, phenological and yield traits of rice crop. All the observations were recorded at the flowering stage (95 DAT). The results revealed that morphological traits like plant height, number of green leaves, number of productive tillers, total dry matter, total leaf area and root length were high in D1 than D2 (101.6 & 99.76 cm, 21.5 & 16.1 hill-1, 14.5 & 11.5 hill-1, 29.0 &21.1 g hill-1, 3.79 & 4.11 dm2 hill-1 and 14.6 & 18.2 cm), physiological traits such as photosynthetic rate (14.55 & 13.45 µ mole CO2 m-2 s-1) and Transpiration rate (12.86 & 11.01 m mole H2O m-2 s-1) similarly phenological traits, DPI (80.6 & 90.5 days), DF (98.3 & 102.3 days), DPM (116.7 & 127.2 days) and DHM (124.7 & 135.4 days). Reproductive traits like pollen viability (91.3 & 87.4 %) and spikelet fertility (84.3 & 75.9 %) and grain yield (7744.8 & 6531.3 kg ha-1). Among the genotypes GNV-10-89 (10270.9 kg ha-1) recorded the higher grain yield and lower was observed in BPT-5204 (3937.5 kg ha-1) these results conclude that the late Kharif transplanting was not suitable for this region as there was sharp drop-down of temperature (14.1°C) at a reproductive stage which leads to high spikelet sterility. By looking at the results obtained, among four genotypes GNV-10-89 recorded high grain yield followed by GNV-1108 these two genotypes are considered as moderately tolerant, GNV-1801 is moderately sensitive and BPT-5204 is sensitive to low-temperature stress.
Publisher
Agricultural & Environmental Technology Development Society
Reference33 articles.
1. Aghaee, A., Moradi, F., Zare-Maivan, H., Zarinkamar, F., Pour Irandoost, H. and P. Sharifi. 2011. Physiological responses of two rice (Oryza sativa L.) varieties to chilling stress at seedling stage. African J. of Biotechnol., 10 (39): 7617-7621. 2. Ahmed, F., Islam, M. N., Jahan, M. A., Rahman, M. T. and Ali, M. Z. 2011. Phenology, growth and yield of chickpea as influenced by weather variables under different sowing dates. J. Expt. Biosci. 2 (2):83-88. 3. Distinguishing the effects of genotype and seed physiological age on low temperature tolerance of rice (Oryza sativa L;Ali;) Experimental Agriculture,2006 4. Andaya, V. C. and Mackill, D. J. 2003. Mapping of QTLs associated with cold tolerance during the vegetative stage in rice. Journal of Experimental Botany 54: 2579-2585. 5. Cruz, R. P. D., Milach, S. C. K. and Federizzi, L. C. 2006. Rice cold tolerance at the reproductive stage in a controlled environment. Sci. Agric., 63 (3): 255-261.
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