甘蔗组织中游离氨基酸组分和含量研究

在甘蔗幼苗中,各个器官的丙氨酸含量都比较高,但在完全展开叶的叶片和叶鞘中丝氨酸含量更高;游离氨基酸总量的分布为完全展开叶叶片》完全展开叶叶鞘,苗根>心叶、幼茎,在伸长盛期和工艺成熟前期9个甘蔗基因型+1叶均以丙氨酸占优势。不同基因型的各种游离氨基酸含量都有明显的差异。在工艺成熟前期,早熟基因型的游离氨基酸总量比较低。伸长盛期与工艺成熟前期游离氨基酸总量之比值也与不同基因型的熟性密切相关,中晚熟品种的明显较低.早熟品种的较高,三个细茎早熟原种材料的更高。

STUDIES ON FREE AMINO ACID COMPONENTS AND THEIR CONTENTS IN SUGARCANE (Saccharum spp.) TISSUES

Alanine contents were found to be high in various tissues of sugarcane young plants, but serine contents were even higher in the full-developed leaf blade and full-developed leaf sheath. The distribution of total free amino acid contents in the organs shown as those in full-developed leaf blade>fulldeveloped leaf sheath, root>leaf spindle>young stalk. The contents of eighteen free amino acid components in +1 leaf of nine genotypes were also determined at abundant elongating stage and early technical maturing stage. Alanine prevailed over the others at the two stages, but all of them were different among nine genotypes. The total free amino acid contents in the early-maturing genotypes were much lower at early technical maturing stage than at abundant elongating stage. The ratios of total free amino acid content at abundant elongating stage and early technical maturing stage were closely related to the maturity of different genotypes, those of the middle-late varieties were markedly lower than those of the early-maturing varieties, which were much lower than those of three small-stalk and early-maturing original species genotypes.