Zinc-boron interaction effects in oilseed rape

Harsharn Singh Grewal, Robin D. Graham, James Stangoulis

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The interaction effect of applied zinc (Zn) and boron (B) on early vegetative growth and uptake of Zn and B by two oilseed rape (canola) (Brassica napus L.) genotypes was investigated in a sand culture experiment under controlled environmental conditions. Two genotypes (Yickadee and Dunkeld) were grown at three Zn levels (0.05, 0.25, and 2.0 mg kg-1 soil) and two B levels (0.05 mg kg-1 soil and 0.5 mg kg-1 soil). Dunkeld produced significantly higher shoot and root dry matter than Yickadee at low Zn and low B supply indicating the superiority of Dunkeld over Yickadee for tolerance to both low Zn and low B supply. Chlorophyll content of fresh leaf tissue was increased significantly by an increase in Zn and B supply. Zinc deficiency enhanced B concentration in younger and older leaves. Boron concentration was higher in older leaves than in the younger leaves irrespective of B deficiency and sufficiency indicating immobility of B in two oilseed rape genotypes tested. Zinc concentration was higher in younger leaves than in the older leaves indicating mobility of Zn. An increased supply of Zn enhanced B uptake under high boron supply only. Zinc uptake in Dunkeld was enhanced significantly with an increased rate orb supply under high Zn supply, while the effect was not significant in Yickadee. Dunkeld proved to be more efficient in Zn and B uptake than Yickadee.

Original languageEnglish
Pages (from-to)2231-2243
Number of pages13
JournalJournal of Plant Nutrition
Volume21
Issue number10
DOIs
Publication statusPublished - 1 Jan 1998
Externally publishedYes

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