CHANGES IN THE AMIDE AND AMINO-ACID-COMPOSITION OF XYLEM EXUDATE FROM PERENNIAL RYEGRASS (LOLIUM-PERENNE L) DURING REGROWTH AFTER DEFOLIATION
CHANGES IN THE AMIDE AND AMINO-ACID-COMPOSITION OF XYLEM EXUDATE FROM PERENNIAL RYEGRASS (LOLIUM-PERENNE L) DURING REGROWTH AFTER DEFOLIATION
复制标题
DOI：
10.1007/bf02465220
复制
发表时间：
1991-09-01
期刊：
影响因子：
4.9
通讯作者：
BOUCAUD, J
中科院分区：
文献类型：
--
作者：
BIGOT, J;LEFEVRE, J;BOUCAUD, J
本文报道了培养第8周和第12周两次去叶的黑麦草叶片再生过程中木质部汁液中氨基酸的分析结果。 本文还测定了叶、根和根茬的游离氨基酸组成，并报道了部分结果。在落叶之前，木质部汁液含有高比例的酰胺，特别是谷氨酰胺。 在落叶后的再生过程中，木质部汁液中天冬酰胺的比例增加，直到第三天出现天冬酰胺/谷氨酰胺的最高比率。 结果进行了比较，在不同的植物部位的游离氨基酸的相对量，并讨论了源库氮转移。
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.