Elevated temperature modulates rice pollen structure: a study from foothill of Himalayan agro-ecosystem in India
- 20 Downloads
Rice cultivation is practiced in various agro-climatic zones ranging from tropical to temperate. Anthesis is a critical stage for deciding productivity which is controlled by numerous biotic and abiotic stresses. Elevated temperature is one of the key abiotic stresses that adversely modulate the pollen formation and structure, i.e., infertility, results in productivity decline. The present study was conducted to investigate the effects of elevated temperature on morphological changes in pollen grains of rice grown in temperature gradient tunnel (TGT) constructed in filed condition. The ambient and TGT temperature varied from 31.84 °C(max) to 20.56 °C(min) and 41.91 °C(max) to 22.37 °C(min), respectively, during study period. The scanning electron and light microscopic study showed extreme morphological abnormalities viz. shape and size in pollen grains of rice exposed to elevated temperature as compared to ambient. These abnormalities induced by elevated temperature may drastically decline grain filling potential which ultimately reduces grain yield in future climate change. This study will enlighten rice researchers for further screening of rice genotypes thermotolerant to foothills of Himalayan agro-ecosystem.
KeywordsRice Elevated temperature Pollen behavior Climate change Himalayan foothills
Authors impart sincere thanks to Directorate of Rice Research (ICAR), Hyderabad, India for providing rice genotypes. We also thankful to the Department of Biological Sciences, College of Basic Sciences & Humanities and the Department of Veterinary Anatomy, College of Veterinary and Animal Sciences, Pantnagar for providing their microscope facilities.
Compliance with ethical standards
Conflict of interest
The authors declared there is no conflict of interest in this manuscript.
- IPCC (2007) Intergovernmental panel on climate change. Fourth assessment report of the intergovernmental panel on climate change: the impacts, adaptation and vulnerability. Cambridge University Press, New YorkGoogle Scholar
- IPCC (2014) Climate change 2014: synthesis report. In: Pachauri RK, Meyer LA (eds) Contribution of working groups I, II and III to the fifth assessment report of the intergovernmental panel on climate change. IPCC, Geneva, p 151Google Scholar
- Kumar N (2014) PhD thesis: physiological, biochemical and molecular characterization of some rice (Oryza sativa L.) genotypes in response to terminal heat stress submitted to GBPUA&T, Pantnagar, p 180Google Scholar
- Matsui T, Manigbas NL, Redona E (2009) Heat-induced floret sterility in rice: mechanisms of occurrence and tolerance. Gamma Field Symp 48:43–49Google Scholar
- Singh H, Verma A (2013a) Characterization and screening of high nitrogen efficient rice genotype to curtail environmental pollution. Int J Agric Environ Biotechnol 6:23–30Google Scholar
- Singh H, Verma A, Krishnamoorthy M, Shukla A (2010a) Consequence of diverse nitrogen levels on leaf pigments in five rice genotypes under field emergent circumstance. Int J Bio-resour Stress Manag 1:189–193Google Scholar
- Singh H, Verma A, Shukla A (2010b) Comparative study of yield and yield components of hybrid and inbred genotypes of rice (Oryza sativa L.). Int J Agric Environ Biotechnol 3:355–360Google Scholar
- Singh DK, Agnihotri RK, Ganie SA, Singh G, Sharma R (2013) Pollen fertility and scanning electron microscopic studies of Sida cordifolia L. Indian Res J Genet Biotechnol 5:98–104Google Scholar
- Zhou S, Wang Y, Li W, Zhao Z, Ren Y, Wang Y, Gu S, Lin Q, Wang D, Jiang L, Su N, Zhang X, Liu L, Cheng Z, Lei C, Wang J, Guo X, Wu F, Ikehashi H, Wang H, Wana J (2011) Pollen semi-sterility1 encodes a kinesin-1–like protein important for male meiosis, anther dehiscence, and fertility in rice. Plant Cell 23:111–129CrossRefGoogle Scholar