Role of sedoheptulose-1,7 bisphosphatase in low light tolerance of rice ( Oryza sativa L.)
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RESEARCH ARTICLE
Role of sedoheptulose-1,7 bisphosphatase in low light tolerance of rice (Oryza sativa L.) Awadhesh Kumar1 • Darshan Panda1 • Soumya Mohanty1 • Monalisha Biswal1 Prajjal Dey2 • Manaswini Dash1 • Rameswar Prasad Sah1 • Sudhir Kumar3 • Mirza Jaynul Baig1 • Lambodar Behera1
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Received: 24 April 2020 / Revised: 30 September 2020 / Accepted: 23 October 2020 Ó Prof. H.S. Srivastava Foundation for Science and Society 2020
Abstract Rice grain yield is drastically reduced under low light especially in kharif (wet) season due to cloudy weather during most part of crop growth. Therefore, 50–60% of yield penalty was observed. To overcome this problem, identification of low light tolerant rice genotypes with a high buffering capacity trait such as photosynthetic rate has to be developed. Sedoheptulose1,7 bisphosphatase, a light-regulated enzyme, plays pivotal role in the Calvin cycle by regenerating the substrate (RuBP) for RuBisCo and therefore, indirectly regulates the influx of CO2 for this crucial process. We found a potential role of SBPase expression and activity in low light tolerant and susceptible rice genotypes by analyzing Electronic supplementary material The online version of this article (https://doi.org/10.1007/s12298-020-00905-z) contains supplementary material, which is available to authorized users.
its influence on net photosynthetic rate and biomass. We observed a significant relationship of yield with photosynthesis, SBPase expression and activity especially under low light conditions. Two tolerant and two susceptible rice genotypes were used for the present study. Tolerant genotypes exhibited significant but least reduction compared to susceptible genotypes in the expression and activity of SBPase, which was also manifested in its photosynthetic rate and finally in the grain yield under low light. However, susceptible genotypes showed significant reduction in SBPase activity along with photosynthesis and grain yield suggesting that tracking the expression and activity of SBPase could form a simple and reliable method to identify the low light tolerant rice cultivars. The data were analyzed using the Indostat 7.5, Tukey–Kramer method through Microsoft Excel 2019
& Lambodar Behera [email protected]; [email protected]
Sudhir Kumar [email protected]
Awadhesh Kumar [email protected]
Mirza Jaynul Baig [email protected]
Darshan Panda [email protected]
1
ICAR-National Rice Research Institute, Cuttack, Odisha 753006, India
Soumya Mohanty [email protected]
2
Faculty of Agriculture, Sri Sri University, Cuttack, Odisha 754006, India
Monalisha Biswal [email protected]
3
ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
Prajjal Dey [email protected] Manaswini Dash [email protected] Rameswar Prasad Sah [email protected]
123
Physiol Mol Biol Plants
and PAST4.0 software. The significant association of SBPase activity with the grain yield, net assimilation rate, electron transfer rate, biomass and g
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