苗期低溫對(duì)烤煙花芽分化及發(fā)育進(jìn)程的影響
Effects of Low Temperature in Seedling Stage on Floral Differentiation and Development of Flue-cured Tobacco
-
摘要: 采用體視解剖鏡觀察了低溫誘導(dǎo)后烤煙莖端分生組織的花芽分化過程，并結(jié)合盆栽和大田試驗(yàn)研究了6個(gè)烤煙品種的現(xiàn)蕾和中心花開放過程,，分析比較了花芽分化對(duì)苗期低溫的敏感性,。結(jié)果表明，鏡檢花芽分化結(jié)果與大田和盆栽的實(shí)際現(xiàn)蕾情況保持了較好的一致性,。從有效葉數(shù)損失率分析,，并結(jié)合花芽分化提前的程度，云煙97和云煙87屬于苗期對(duì)低溫敏感性較強(qiáng)的品種,，云煙85和云煙201次之,，紅大對(duì)苗期低溫的分化響應(yīng)能力較弱。而K326的情況比較特殊，無論是莖端花芽分化的鏡檢結(jié)果,，還是最終的現(xiàn)蕾和中心花開放結(jié)果,，都表現(xiàn)出經(jīng)低溫誘導(dǎo)的煙株生長(zhǎng)進(jìn)程被推遲。Abstract: Morphology of floral differentiation on the top of tobacco stalk was investigated with stereomicroscope, and pot and field experiments were conducted with the observation on the button stage and early flower period to compare the sensitivity to low temperature of six flue-cured tobacco cultivars. The results showed that observation on floral differentiation with stereomicroscope was in accordance with the button stage in pot and field experiment. In terms of the loss of available leaves and the floral differentiation, Yunyan85 and Yunyan201 were considered less sensitive than Yunyan97 and Yunyan87, but quite more sensitive than Hongda. While the growth and development of K326 was prolonged in foral differentiation, button stage and flowering.
下載: