TEMPERATURE EFFECTS ON EMBRYONIC ABSCISIC-ACID LEVELS DURING DEVELOPMENT OF WHEAT-GRAIN DORMANCY
TEMPERATURE EFFECTS ON EMBRYONIC ABSCISIC-ACID LEVELS DURING DEVELOPMENT OF WHEAT-GRAIN DORMANCY
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DOI：
10.1007/bf02041941
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发表时间：
1990-12-01
影响因子：
4.8
通讯作者：
SESING, J
中科院分区：
文献类型：
--
作者：
WALKERSIMMONS, M;SESING, J
在成熟籽粒产生高或低水平休眠的温度条件下，测定了小麦胚和剩余籽粒残体发育过程中的脱落酸（阿坝）水平。与25 ℃相比，在15 ℃下在来自植物的谷粒中产生更高水平的谷粒休眠。在15 ℃下生长的谷粒中，胚胎阿坝水平在发育过程中稳定地增加，在阶段IV，即谷粒干燥之前达到最大值。在25 ℃时，阿坝水平在胚胎发育的最早阶段非常高，但在成熟过程中迅速下降。只有小品种的阿坝水平的差异，观察在发展过程中，在任何温度。在一般情况下，较高水平的休眠在成熟的谷物与阿坝水平的长期升高在谷物成熟。
Abscisic acid (ABA) levels were determined in both the embryo and remaining grain remnant during development of wheat caryposes under temperature conditions which produced either high or low level levels of dormancy in mature grain. Higher levels of grain dormancy were produced in grain from plants in 15.degree.C as compared to 25.degree.C. In grain grown at 15.degree.C, embryonic ABA levels steadily increased during development, reaching a maximum at stage IV, just before grain desiccation. At 25.degree.C, ABA levels were very high at the earliest stages of embryonic development, but dropped rapidly during maturation. Only small cultivar differences in ABA levels were observed during development at either temperature. In general, higher levels of dormancy in mature grain correlated with prolonged elevation of ABA levels during grain maturation.