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Effect of root zone temperature on oilseed rape ( Brassica napus ) response to boron

Ye, Z., Bell, R.W., Dell, B., Huang, L. and Xu, Q. (2006) Effect of root zone temperature on oilseed rape ( Brassica napus ) response to boron. Communications in Soil Science and Plant Analysis, 37 (15-20). pp. 2791-2803.

Link to Published Version: http://dx.doi.org/10.1080/00103620600832514
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Abstract

Oilseed rape (Brassica napus) is sensitive to low boron (B) supply, and its growth response to B may be influenced by soil temperature. To test the relationship between B and temperature, oilseed rape (cv. Hyola 42) seedlings were grown at 10°C (low) root zone temperature (RZT) with B supply from deficient to adequate B levels until growth of low B plants just began to slow down. Half of the pots were then transferred to 20°C (warm) RZT for 11 days before they were moved back to 10°C RZT for the final 4 days. Both plant dry mass and B uptake increased after plants were exposed to warm RZT. However, plant B deficiency was exacerbated by warm RZT in low B plants because of increased relative growth rate and shoot–root ratio without a commensurate increase in B uptake rate. It is concluded that RZT above the critical threshold for chilling injury in oilseed rape can nevertheless affect the incidence of B deficiency by altering shoot–root ratio and hence the balance between shoot B demand and B uptake.

Publication Type: Journal Article
Murdoch Affiliation: School of Environmental Science
Publisher: Marcel Dekker Inc.
Copyright: © Taylor & Francis Group, LLC
URI: http://researchrepository.murdoch.edu.au/id/eprint/6622
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