Anatomical Studies of Primary Vascular System of Helianthus Annuus
Zhang Li-juan · Jilin Nongye Daxue xuebao · 2006
Based on the cotyledon node zone theory,the seedling of primary vascular system of Helianthus annuus was studied.Its cotyledon node zone is telome elongation type.The lower part of its cotyledon node zone is cotyledon node zone-root transition region,and its upper part is cotyledon node zone-stem connection region.The cotyledon node zone type was reported firstly in the plants of Compositae.The results are different from those of other plants in Compositae.