摘要
以常规香稻品种桂香占和美香占为材料,采用盆栽试验,研究了孕穗期水分对香稻香气及生理特性的影响。结果表明:孕穗期土壤水势维持在0～-25(±5)kPa时显著增加了2个香稻品种糙米的香气含量,并在一定程度上显著提高了游离脯氨酸含量和成熟期叶片、籽粒的脯氨酸氧化酶活性。孕穗期土壤水势维持在0～-50(±5)kPa时减少了2个品种糙米的香气含量,同时降低了2个品种籽粒脯氨酸氧化酶活性,但没有达到显著水平。因此,适当的孕穗期节水灌溉模式能有效提高香稻香气含量;而较强的水分胁迫影响了水稻后期的生理活性,减少了香稻2-AP的合成与积累。两个水分处理均显著降低齐穗期倒二叶相对含水量。
Effects of different irrigation modes on aroma content and physiological characteristics in brown rice were studied in pot, by using Guixiangzhan and Meixiangzhan of the conventional aromatic rice for material at booting stage. The results showed that the sol water potential maintained at 0-25 （±5））kPa could significantly increase free proline content to a certain extent and proline oxidase activit~ of rice leaves and grains which could further significantly increase the aroma content of brown rice in both varieties. The soil watel potential maintained at 0-50 （±5）kPa could reduce proline oxidase activity of grains, but not significant, and reduced the aroma content o brown rice. Therefore, appropriate water saving irrigation could effectively improve the aroma content of aromatic rice at booting stage while, high-intensity water stress could affect the physiological activity, and reduced the formation and accumulation of 2-acetyl-1- pyrroline in the later growth process. Two irrigation modes significantly reduced the second leaf relative water content in full heading stage.
出处
《广东农业科学》
CAS
CSCD
北大核心
2013年第8期1-3,共3页
Guangdong Agricultural Sciences
基金
国家自然科学基金(31271646)
广东省自然科学基金(8151064201000017
10451064201005387)
广东省自然科学基金博士启动项目(S52011040004466)
广东省农业攻关项目(2006A20303001)
广东省农业标准化项目(4100F10003)
教育部博士点基金(20104404120006)
关键词
香稻
水分
香气
脯氨酸
相对含水量
aromatic rice
water irrigation
aroma
proline
relative water content
作者简介
王培（1988-），女，在读硕士生，E-mail：siyuehuakai0418@163．com
通讯作者：肖立中（1964-），男，硕士，副教授，E-mail：lzxiao@scau．edu．cn
