The development characteristics variation of the vegetative structure in the different morphotypes treescrowns are regarded as a result of the genetic differentiation and environment interaction. The morphohysiologica...The development characteristics variation of the vegetative structure in the different morphotypes treescrowns are regarded as a result of the genetic differentiation and environment interaction. The morphohysiological characteristics and the evaluation of their function in meaning the morphogeny of different sex and position of crown shoots are used toreveal means of morphotype forming in Pinus sibirica. It has been found that the differences of activity and dircction waschanged of shoots grouth characteristics in ontogeny of trees with different growth and reproductive activity, and that the sizeof the individual meristematic layer in tl1e vegetative and generative apex differ and increase with its age. Transmission fromvegetative to the reproductive stage in contrast of age modification is correlated with the sudden increased of the medullar parenchyma size. Thus the intensification of mitotic activity in the medullar zone of the apex and the increase in apical size precedes the shoot feminization. The large activity of stem unit which correlated slightly with its unit stem change is inherent inthe male and asexual tree morphotyes.展开更多
文摘The development characteristics variation of the vegetative structure in the different morphotypes treescrowns are regarded as a result of the genetic differentiation and environment interaction. The morphohysiological characteristics and the evaluation of their function in meaning the morphogeny of different sex and position of crown shoots are used toreveal means of morphotype forming in Pinus sibirica. It has been found that the differences of activity and dircction waschanged of shoots grouth characteristics in ontogeny of trees with different growth and reproductive activity, and that the sizeof the individual meristematic layer in tl1e vegetative and generative apex differ and increase with its age. Transmission fromvegetative to the reproductive stage in contrast of age modification is correlated with the sudden increased of the medullar parenchyma size. Thus the intensification of mitotic activity in the medullar zone of the apex and the increase in apical size precedes the shoot feminization. The large activity of stem unit which correlated slightly with its unit stem change is inherent inthe male and asexual tree morphotyes.
