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Effects of boron deficiency and low temperature on wheat sterility

Huang, L., Pant, J., Bell, R.W., Dell, B. and Deane, K. (1996) Effects of boron deficiency and low temperature on wheat sterility. In: Rawson, H.M. and Subedi, K.D., (eds.) Sterility in Wheat in Sub-tropical Asia: Extent, Causes and Solutions. Australian Centre for International Agricultural Research, Canberra, pp. 91-102.

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Abstract

Wheat exhibits sterility in many parts of subtropical and tropical Asia. Boron deficiency is believed to be the cause of sterility in many, but not all, cases. This creates the need for standards to allow B deficiency to be diagnosed and distinguished from other causes of sterility. This study was designed to investigate the responses of functional indicators of B requirements, namely leaf blade elongation rates and potassium leakage rates, to B supply (0 and 10 μM B) and night temperature (ambient: > 10°C and low: > 5°C). An objective of the study was to develop diagnostic and prognostic standards for B deficiency, based on the functional B requirements for leaf elongation and membrane permeability.

Although the interruption of B supply (-B) significantly decreased B concentrations in leaf blades and ears, it had no consistent effect on rates of leaf blade elongation or leaf K leakage in the two cultivars of wheat tested at either the vegetative or the reproductive stage. Low night temperature also had little effect. However, the grain set index (GSI) was significantly decreased by the –B treatment. Low night temperature had no effect on GSI in +B plants. In -B plants, ambient night temperature decreased GSI apparently by accelerating ear development, so that critical stages of grain set coincided more with the deficiency of B than in -8 plants exposed to low night temperatures.

Publication Type: Book Chapter
Murdoch Affiliation: School of Biological and Environmental Sciences
Publisher: Australian Centre for International Agricultural Research
Notes: ACIAR Proc. No. 72
URI: http://researchrepository.murdoch.edu.au/id/eprint/13010
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