摘要
[Objective] Understanding the photosynthetic characteristics of the rice CMS line Renong 1A with leaf color markers can promote its utilization in breeding. [Method] The wild type （WT） of rice spontaneous mutant with virescent-yellow leaves that was the male parent of Renong 1A was selected as the control, and the contents of photosynthetic pigments, photosynthetic parameters, light-response curve and chlorophyll fluorescence kinetic parameters of Renong 1A were measured at the tillering stage. [Result] New leaves of Renong 1A yellowed obviously in the early period. Chlorophyll content, photosynthetic rate and values of parameters Pdt, F/Fm Fv＇/Fm＇,φPSII, and ETR of Renong 1A were all significantly lower than those of the control. However, there was no difference between Renong 1A and the control in terms of photosynthetic rate of leaves turning green. [Conclusion] The photosynthetic capacity of new leaves of Renong 1A decreased at the early stage due to the reduction of chlorophyll content, and then it became normal at the later stage with the increase of chlorophyll content.
[目的]了解水稻热农1A的光合特性可促进其在育种上的利用。[方法]该研究以热农1A的父本新叶黄化突变体对应的野生型WT为对照,在分蘖期测定光合色素含量、光合参数、光响应曲线和叶绿素荧光动力学参数。[结果]热农1A的新生叶前期黄化明显,其叶绿素含量、光合速率、P_n、F_m、F_v’/F_m’、Φ_(PSII)和ETR均显著低于对照,而叶片转绿后的光合速率与对照相比无差异。[结论]热农1A新生叶前期因降低的叶绿素含量导致其光合能力减弱,而后期随着叶绿素含量提高,其光合作用能力恢复正常。
基金
海南省自然科学基金项目(No.20163129)
中国热带农业科学院基本科研业务费专项资金(No.1630032016026,No.1630032016021)~~
作者简介
林秋云（1987-），女，海南海口人，博士，助理研究员。主要从事水稻分子遗传与育种研究．E-mail：qylinpzs@163.com
