摘要
测试了无花瓣油菜突变品系Apet33-10初花期、盛花期和青荚期的光合效率和叶绿素荧光。结果显示,虽然无花瓣油莱减少了花瓣对光线的遮挡,但是其光合效率并没有得到提高,反而还不如有花瓣正常油菜,ApetF33-10净光合速率、F_v/F_m和F_v/F。低于有花瓣油菜近等基因系Pet33-10。比较了Apet33-10和Pet33-10花器的生物产量,发现除没有花瓣外,无论是大小,还是生物产量,两者的花器都没有明显的差异。在单株角果数、每角粒数、千粒重和单株产籽量方面,Apet33-10均没有显著性的提高差异。光合效率低可能是导致Apet33-10没有产量优势的主要原因。
Six important parameters in photosynthesis and chlorophyll fluorescence of the apetalous line Apet33-10 in Brassica napus were compared with those of its petalled near-isogenic line Pet33-10. The results showed that the photosynthetic capacity of Apet33-10 couldn＇t be improved though the apetalous flowers resulted in the increasing the transmission of light through the flower layer. The net photosynthetic rate （P,） and the optimal PS Ⅱ efficiency （Fv/Fm） of the functional leaves and siliquae of Apet33- 10 were lower than those of its petalled near-isogenic line Pet33-10 at the early flowering, the full flowering and the green canopy stage, respectively. The flower organs of Apet33-10 and Pet33-10 were compared. Results showed that there was almost no difference in the length of bud, stamen, sepal and pistil between the apetalous and petalous lines. Except for the loss of petal, there was little difference in the weight of sepal, stamen and pistil between the apetalous and petalous lines. Compared with Pet33-10, the number of productive pods on the main inflorescence of Apet33-10 decreased, on the other hand, the pods on the second order branches increased. There were no apparent differences in the number of productive pods per plant, seed number per pod, 1000 seed weight and seed yield per plant between apetalous and petalous lines. Lower photosynthetic efficiency may be the main cause of no superiority on seed yield of the apetalous line Apet33-10.
出处
《四川大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第3期843-848,共6页
Journal of Sichuan University(Natural Science Edition)
基金
国家自然科学基金(30571174)
关键词
无花瓣
甘蓝型油菜
光合效率
叶绿素荧光
产量
apetalous, Brassica napus, photosynthetic efficiency, chlorophyll fluorescence, seed yield
