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对野生一粒麦 (T.boeoticum)和普通小麦品种品七 (T.aestivum.cv.Pin7)开花期不同绿色器官光合速率 (Pn)、色素含量、 PSII活性及叶绿体超微结构进行了考察。结果表明 :野生一粒麦各器官 (旗叶叶片、叶鞘、穗下节间、穗 )的光合速率均明显高于栽培品种品七 ,这与各器官具有较高的叶绿素含量和较多的叶绿体基粒片层数目有密切关系。各器官 PSII活性在两种基因型间无明显差异。同一基因型不同器官的光合能力表现为叶片 >叶鞘 >穗下节间 >穗。叶绿素 a与 b的比值 (Chl a/ b)和类胡萝卜素与叶绿素的比值 (Car/ Chl)均是栽培种大于野生种、非叶器官大于旗叶叶片 ,暗示普通小麦栽培种比野生一粒麦、非叶器官比叶片更能适应强光环境
The photosynthetic rate (Pn), pigment content, PSII activity and chloroplast ultrastructure of different green organs of T.boeoticum and T.aestivum.cv.Pin7 were investigated. The results showed that the photosynthetic rate of all the organs (flag leaf, leaf sheath, internode spike, ear) of wild one grain was significantly higher than that of cultivated variety Q7, which was associated with higher chlorophyll content and chloroplast The number of grana layers is closely related. There was no significant difference in PSII activity between the two genotypes. The photosynthetic capacity of different organs of the same genotype showed leaf> leaf sheath> inferior ear joint> ear. The ratios of chlorophyll a to b (Chl a / b) and carotenoid to chlorophyll (Car / Chl) were higher in cultivars than in wild species and non-leaf organs were larger than that of flag leaf, suggesting that the cultivars of common wheat Wheat, non-leaf organs more adapted to the glare environment than the leaves