Ammonium nutrition enhances chlorophyll and glaucousness in Kohlrabi

被引：26

作者：

Blanke, MM ^{[1
]}

Bacher, W ^{[1
]}

Pring, RJ ^{[1
]}

Baker, EA ^{[1
]}

机构：

[1] UNIV BRISTOL, DEPT AGR SCI, IACR, LONG ASHTON RES STN, BRISTOL BS18 9AF, AVON, ENGLAND

来源：

ANNALS OF BOTANY | 1996年 / 78卷 / 05期

关键词：

Brassica oleracea; chlorophyll; chlorophyll fluorescence; epicuticular wax; glaucousness; photosynthesis; transpiration;

D O I：

10.1006/anbo.1996.0166

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Kohlrabi (Brassica oleracea var. gongylodes) plants were grown in the greenhouse under autumn conditions and fertilized either with pellets containing nitrogen as 40% ammonium sulphate and 60% urea or with nutrient solution containing nitrogen predominantly as nitrate. Plants given nitrogen as ammonium ions developed glaucous leaves compared to those supplied with nitrate which formed glossy leaves. Ammonium-induced glaucousness was the result of a two-fold increase in the amount of epicuticular wax and a markedly altered fine structure. Leaves from ammonium fertilized kohlrabi plants also showed a 21% increase in chlorophyll content together with a reduction in the chlorophyll a:b ratio and decreased ground state fluorescence compared to plants supplied with nitrate. Photosynthesis and stomatal transpiration were unaffected by the form of supplied nitrogen. (C) 1996 Annals of Botany Company

引用

页码：599 / 604

页数：6