摘要
水稻幼苗缺硫培养12—15天,叶和根中的乙烯产生量明显降低,缺硫培养时间延长,根的乙烯产生量继续降低,叶的乙烯产生量升高。在缺硫幼苗中供给 SO_4^(2-)和0.1mmol/l 的半胱氨酸,乙烯产生量分别在36和12小时后升高到加硫幼苗的水平。供给0.1mmol/l 蛋氨酸,6小时后的乙烯产生量已高于加硫的幼苗。测定培养13天的幼苗叶片中游离氨基酸表明,缺硫幼苗其蛋氨酸和胱氨酸的含量降低。
The rice seedlings for experimental use were raised by water culture.When the seed- lings were grown in sulfur deficient solutin for 13—15 days,the ethylene production from the roots and the leaves was decreased.If seedlings were continuously grown in sulfur deficient solution,the ethylene production was decreased in roots,but increased in leaves.When the S- deficient seedlings were supplied with SO_^(2-) or 0.1 mmol/l cysteine,the ethylene production was increased approximately up to that in control after 36 and 12 hours respectively.The S- deficient seedlings supplied with 0.1 mmol/l methionine for 6 hours will produce much more ethylene than that in control.The contents of cystine and methionine were decreased in lea- ves of S-deficient seedlings grown for 13 days.
关键词
硫
水稻幼苗
乙烯产生
Sulfur
Cysteine
Methionine
Ethylene production
Rice seedlings
