【摘要】 以小麦品种西农1043、陕253为材料,经空间诱变处理后将种子在地面种植,测定小麦功能叶片的叶绿素荧光参数和光合特性的变化。研究表明:空间诱变处理后,2个供试材料的PSⅡ原初光能转化效率(Fv/Fm)、PSⅡ潜在活性(Fv/F0)、光化学猝灭系数(qP)均比对照低,同时处理的净光合速率也低于对照,非光化学猝灭(qN)较对照有所升高。表明小麦种子经过空间诱变处理后,光合系统的发育受到一定程度的影响,光合电子传递、光合原初反映过程受到抑制,光合作用能力下降,植株形态受到影响,千粒重有所下降。更多还原

【Abstract】 The effects of the space environment on the chlorophyll fluorescence parameters and photosynthesis characteristics of wheat cultivars,Xinong1043 M1 and Shaan253 M₁,were studied.The results showed that the decrement of contents of PSⅡprimary photochemical efficiency（F_v/F_m）,potential activity（F_v/F₀）,photochemical quenching coefficient（qP）and photosynthesis rate（Pn）were less than that of control,increment of non-photochemical quenching coefficient（qN）were more than that of control.The results suggested that photosynthetic apparatus were damaged,photosynthetic electron transport,photosynthetic primary reaction were inhibited,rate of photosynthesis decreased and growth of M₁ plant were retarded,which leading to thousand kernel weights decreased.更多还原