CHANGES IN THE AMIDE AND AMINO-ACID-COMPOSITION OF XYLEM EXUDATE FROM PERENNIAL RYEGRASS (LOLIUM-PERENNE L) DURING REGROWTH AFTER DEFOLIATION

被引：14
|
作者：
BIGOT, J [1 ]
LEFEVRE, J [1 ]
BOUCAUD, J [1 ]
机构：
[1] UNIV CAEN,INST RECH BIOL APPL,PHYSIOL & BIOCHIM VEGETALES LAB,F-14032 CAEN,FRANCE
来源：
PLANT AND SOIL | 1991年 / 136卷 / 01期
关键词：
ASPARAGINE; FREE-AMINO ACIDS; GLUTAMINE; LOLIUM-PERENNE L; REGROWTH; XYLEM SAP EXUDATION;
D O I：
10.1007/BF02465220
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
The paper presents the results of amino acid analyses in xylem sap during leaf regrowth of ryegrass plants defoliated firstly at the 8th and secondly at the 12th week of culture. The free amino acid composition of leaves, stubble and roots was also determined and some of the results are reported. Prior to defoliation, xylem sap contained a high proportion of amides, particularly glutamine. During regrowth after defoliation, the proportion of asparagine in the xylem sap increased until the third day when the highest ratios of asparagine/glutamine appeared. The results are compared with relative amounts of free amino acids in the different plant parts and discussed in relation to source-sink nitrogen transfer.
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页码：59 / 64
页数：6
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