Boron nutrition and mobility, and its relation to the elemental composition of greenhouse grown root crops I. rutabaga
The nutrition and mobility of B, and its relation to the elemental composition of two cultivars of rutabaga (Brassica napus ssp. rapifera cv. Laurentian and Wilhelmsberger) plants were investigated in greenhouse experiments. Laurentian exhibited a greater response than Wilhelmsberger to continuing B deficiency as indicated by the severity in the roots of brown heart, of external roughness and elongation and of the decrease in B concentration. Signs of B deficiency were not found when the B contents of the root and young leaves were 27 and 56 ..mu..g and g/sup -1/ DM respectively. Root B levels of 14 and 17-20 ..mu..g f/sup -1/ gave moderate and slight internal signs of brown discoloration. Foliar applications of B partially restored the B concentrations of the roots; however, the mechanisms of movement was unclear. The Mg, Mn and Zn contents of roots were the only elements that consistently increased and accumulated under B deficiency. The relative element composition of the root compared to the mature leaves is consistent with the root being supplied predominantly with nutrients by the phloem.
- Research Organization:
- Univ. of Guelph, Ontario
- OSTI ID:
- 6785554
- Journal Information:
- Commun. Soil Sci. Plant Anal.; (United States), Vol. 18:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BORON
NUTRITIONAL DEFICIENCY
TISSUE DISTRIBUTION
BRASSICA
CHEMICAL COMPOSITION
MAGNESIUM
BIOLOGICAL ACCUMULATION
MANGANESE
ZINC
BIOLOGICAL VARIABILITY
LEAVES
NUTRIENTS
ROOTS
ALKALINE EARTH METALS
DISTRIBUTION
ELEMENTS
FOOD
METALS
PLANTS
SEMIMETALS
TRANSITION ELEMENTS
VEGETABLES
560300* - Chemicals Metabolism & Toxicology