SODIUM PARTITIONING WITHIN THE SHOOT OF SOYBEAN

被引：43

作者：

DURAND, M

LACAN, D

机构：

[1] Laboratoire de recherches sur les substances naturelles végétales, Univ. Montpellier II, Sciences et Techniques du Languedoc, Montpellier, F-34095, Place E. Bataillon

来源：

PHYSIOLOGIA PLANTARUM | 1994年 / 91卷 / 01期

关键词：

GLYCINE MAX; NA+ UPTAKE; PARTITIONING; PHLOEM TRANSPORT; SALINITY; SOYBEAN; XYLEM TRANSPORT;

D O I：

10.1111/j.1399-3054.1994.tb00660.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Uptake and partitioning of Na+ and Cl- in plants of soybean (Glycine max L. Merr. cv. Hodgson) exposed to moderate NaCl concentrations were studied over an 8-day period. Plants showed marked retention of Na+ in the stems and low transport to laminae of young leaves. The xylem sap ascending the main axis was progressively depleted in Na+, The oldest leaf greatly contributed to Na+ depletion of the sap flowing to younger leaves. These results in combination with estimates of phloem recirculation indicated that Na+ accumulation in the young leaf was prevented both by depletion of Na+ from the xylem stream, and by a high recirculation of Na+ via the phloem. However, this protection of young leaves was effective only for very mild salinity treatment.

引用

页码：65 / 71

页数：7

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