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
<[www.isaaa.org]
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.

[bmcplantbiol.biomedcentral.com]



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