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Overexpression of Wheat Ferritin Gene Enhances Heat and Abiotic Stress Tolerance
Posted by: Prof. Dr. M. Raupp (IP Logged)
Date: April 14, 2017 04:59PM

The yield of whet (Triticum aestivum L.) is greatly affected by heat stress.
However, the molecular mechanisms underlying heat stress tolerance are
relatively unknown. Xinshan Zang and Xiaoli Geng from
s/download/Facts%20and%20Trends%20-%20China.pdf> China Agricultural
University, together with their colleagues identified a novel ferritin gene,
TaFER, from a previous study of a heat-tolerant wheat cultivar.

To study the function of TaFER-5B in wheat, TaFER-5B was transformed into
the wheat cultivar Jimai5265 (JM5265), resulting in transgenic plants
exhibiting enhanced tolerance to heat stress. The team also overexpressed
TaFER-5B in a ferritin-lacking mutant of Arabidopsis. The transgene
conferred increased heat tolerance to the heat stress-sensitive phenotype of
the mutant Arabidopsis.

Furthermore, TaFER-5B-overexpression enhanced drought, oxidative and excess
iron stress tolerance. The transgenic Arabidopsis and wheat plants also
exhibited improved leaf iron content. These results imply that TaFER-5B
plays an important role in enhancing tolerance to heat stress and other
abiotic stresses.


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