Effects of High Temperature Stress on Growth of Stress-Tolerant Rice Seedlings with Resistibility  

高温胁迫对两个不同耐性水稻幼苗生长的影响（英文）

作　　者：张晓晶[1] 张思远[2] 李春青[1] 张文会[1] 

机构地区：[1]聊城大学生命科学学院,山东聊城252059 [2]燕山大学,河北秦皇岛066004

出　　处：《Agricultural Science & Technology》2014年第4期576-578,584,共4页农业科学与技术（英文版）

基　　金：Supported by National Natural Science Foundation of China(30771156,31200387)~~

摘　　要：Two heat-tolerant rice varieties, N5 and TQ, were chosen as test materi- als. Specifically, rice seedlings （leaf age at 2.1）, cultivated in room, were treated at 40 ℃ for 7 d and some indices were measured, including plant height, dry weight, leaf color, proline, malondialdehyde and conductivity. The results showed that high temperature advanced the growth of N5 seedlings, for example, plant height, root length and dry weight of ground parts all increased. However, high temperature prevented TQ seedlings growth, plant height in particular. Furthermore, high temper- ature treatment increased the content of chlorophyll of N5 and had none effects on PSII of N5, with little damages on membrane system. On the other hand, high temperature actually reduced PSII activity of TQ, and seriously damaged TQ mem- brane system. It is speculated that the differences of the two varieties lie on pro- duction or removing capacity of reactive oxide species.以2个耐热性不同的水稻品系N5和特青(TQ)为材料,在苗期对室内盆栽的2.1叶龄的水稻幼苗进行7 d的40℃高温处理,并测定水稻幼苗株高、干重、叶色、脯氨酸、丙二醛含量及电导率等指标。结果表明,高温处理促进了耐热水稻N5的幼苗生长,表现为株高、根长以及地上部干重显著增加。高温处理抑制了TQ的幼苗生长,尤其是对株高的抑制作用最大。高温处理增加了N5的叶绿素含量,对N5的PSII活性没有影响,对N5的膜系统损害也不明显。而高温处理降低了TQ的PSII活性,并导致TQ的膜系统受到严重损害。推测两者耐性的差异之一在于活性氧自由基的生产量或清除能力上。

关 键 词：High temperature stress Rice seedlings TOLERANCE 

分 类 号：S511[农业科学—作物学]