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Re-translocation of boron in broccoli and lupin during early reproductive growth

Abstract

The objective of the present study was to determine if boron (B) re-translocation depends on plant-B status and external-B supply. The stable {sup 10}B isotope was supplied to the root system of broccoli (Brassica oleracea var. italica Plenck cv. Commander) and lupin (Lupinus albus L. cv. Ultra) plants to provide a quantitative picture of B distribution during early reproductive development. Regardless of the B regime (i.e. continuous supply with luxury, sufficient or deficient B; transfer at influorescence emergence from either a luxury- or sufficient-B supply to a deficient one) and whether {sup 10}B was acquired before or during influorescence development, a significant proportion of the B recovered in broccoli florest and lupin fruit was {sup 10}B enriched. B acquired during inflorescence development was an important source of B for reproductive structures, but the relative importance of B acquired before and after inflorescence emergence appeared to be species dependent. The occurrence of B re-translocation was not dependent upon the induction of B deficiency. The concentrations of B in phloem exsudates (0.38 to 0.03 mM) were 4- to 23-fold those in xylem sap, and more similar to the concentrations in the reproductive structures (0.86 to 0.07 mM) than those in source leaves  More>>
Authors:
Marentes, E; Shelp, B J; [1]  Vanderpool, R A [2] 
  1. Univ. of Guelph, Dept. of Horticultural Science, Guelph, ON (Canada)
  2. USDA, Human Nutrition Research Center, Agricultural Research Service, ND (United States)
Publication Date:
Jun 01, 1997
Product Type:
Journal Article
Reference Number:
SCA: 400202; 553002; PA: AIX-28:052675; EDB-97:099696; SN: 97001823513
Resource Relation:
Journal Name: Physiologia Plantarum; Journal Volume: 100; Other Information: PBD: Jun 1997
Subject:
40 CHEMISTRY; 55 BIOLOGY AND MEDICINE, BASIC STUDIES; BORON 10; BRASSICA; GRAMINEAE; TISSUE DISTRIBUTION; ISOTOPE RATIO; PLANT GROWTH; TRACER TECHNIQUES
OSTI ID:
499443
Country of Origin:
Denmark
Language:
English
Other Identifying Numbers:
Journal ID: PHPLAI; ISSN 0031-9317; TRN: DK9700097052675
Submitting Site:
DKN
Size:
pp. 389-399
Announcement Date:

Citation Formats

Marentes, E, Shelp, B J, and Vanderpool, R A. Re-translocation of boron in broccoli and lupin during early reproductive growth. Denmark: N. p., 1997. Web. doi:10.1034/j.1399-3054.1997.1000222.x.
Marentes, E, Shelp, B J, & Vanderpool, R A. Re-translocation of boron in broccoli and lupin during early reproductive growth. Denmark. doi:10.1034/j.1399-3054.1997.1000222.x.
Marentes, E, Shelp, B J, and Vanderpool, R A. 1997. "Re-translocation of boron in broccoli and lupin during early reproductive growth." Denmark. doi:10.1034/j.1399-3054.1997.1000222.x. https://www.osti.gov/servlets/purl/10.1034/j.1399-3054.1997.1000222.x.
@misc{etde_499443,
title = {Re-translocation of boron in broccoli and lupin during early reproductive growth}
author = {Marentes, E, Shelp, B J, and Vanderpool, R A}
abstractNote = {The objective of the present study was to determine if boron (B) re-translocation depends on plant-B status and external-B supply. The stable {sup 10}B isotope was supplied to the root system of broccoli (Brassica oleracea var. italica Plenck cv. Commander) and lupin (Lupinus albus L. cv. Ultra) plants to provide a quantitative picture of B distribution during early reproductive development. Regardless of the B regime (i.e. continuous supply with luxury, sufficient or deficient B; transfer at influorescence emergence from either a luxury- or sufficient-B supply to a deficient one) and whether {sup 10}B was acquired before or during influorescence development, a significant proportion of the B recovered in broccoli florest and lupin fruit was {sup 10}B enriched. B acquired during inflorescence development was an important source of B for reproductive structures, but the relative importance of B acquired before and after inflorescence emergence appeared to be species dependent. The occurrence of B re-translocation was not dependent upon the induction of B deficiency. The concentrations of B in phloem exsudates (0.38 to 0.03 mM) were 4- to 23-fold those in xylem sap, and more similar to the concentrations in the reproductive structures (0.86 to 0.07 mM) than those in source leaves (2.4 to 0.19 mM). The decreasing acropetal gradient of tissue-B concentrations with luxury-B supply declined dramatically or was reversed in plants grown with sufficient or deficient B. The data are consistent with B being a phloem-mobile element, and suggest that newly acquired B is particularly important during the early reproductive growth of plants. (au) 36 refs.}
doi = {10.1034/j.1399-3054.1997.1000222.x}
journal = {Physiologia Plantarum}
volume = {100}
journal type = {AC}
place = {Denmark}
year = {1997}
month = {Jun}
}