Variation in plant growth, tiller dynamics and yield components of wheat (Triticum aestivum L.) due to high temperature stress
Journal Title: Advances in Agriculture & Botanics - International Journal of the Bioflux Society - Year 2010, Vol 2, Issue 3
Abstract
To observe the effect of high temperature stress on the growth and development of five wheat varieties (Sourav, Pradip, Sufi, Shatabdi and Bijoy) an experiment was conducted at the research field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh (23°77΄N and 90°37΄E) from November, 2008 to April, 2009. There were two growing conditions viz. normal sowing (November 30) and another was late sowing (30 December). The late sown wheat plants phased a significant heat stress, especially at the reproductive period that influenced their growth and development pattern. Plant height, tiller number, yield components and yield were compared of all varieties under two environmental conditions. All the varieties performed negatively for all parameters under heat stress condition. Due to heat stress plant height, no. of total tillers, fertile tillers decreased and no. of sterile tillers increases. In the same environment the ear length, no. of spikelet main stem-1, fertile floret main stem-1decreased and no. of sterile floret main stem-1 increased. The 1000 grain weight and yield also decreased due to high temperature stress. The performance of Bijoy was the best in respect of yield as the yield reduction was the least (53.42%), whereas Sufi showed worst performance (73.01% yield reduction). Therefore, from this study it may be concluded that under high temperature stress the performance of the variety Bijoy was the best especially regarding the yield components and yield.
Authors and Affiliations
Kamal-Uddin Ahamed, Kamrun Nahar, Masayuki Fujita, Mirza Hasanuzzaman
Keywords
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