首页 | 本学科首页   官方微博 | 高级检索  
     


Vessel-diameter distribution in roots of grapevines (Vitis vinifera L. cv. Shiraz)
Authors:Emmanuel Mapfumo  Donald Aspinall  Trevor W. Hancock
Affiliation:(1) Department of Horticulture, Viticulture and Oenology, University of Adelaide, Waite Agricultural Research Institute, Glen Osmond, 5064, South Australia;(2) Department of Plant Science, University of Adelaide, Waite Agricultural Research Institute, Glen Osmond, 5064, South Australia
Abstract:
The distribution frequency patterns of diameter of xylem vessels and percentage of total predicted axial conductances were studied in 190-day and 212-day-old main roots of grapevine (Vitis vinifera L. cv. Shiraz) grown under well-watered and stressed conditions. The protoxylem were the first to mature and were responsible for most of the theoretical conductance in root segments between the tip and 2.5 cm from the tip. Some large xylem vessels retained cross walls and protoplasm up to 22.5 cm from the tip. Statistical tests using the Kolmogorov-Smirnov two sample test showed that the pattern of distribution frequency of xylem vessels classified in different diameter classes varied with distance from the root tip. The distribution frequency of xylem vessels was similar in both well-watered and stressed plants from the tip up to 15 cm from the tip. At distances further from the tip the distribution frequency of xylem vessels of well-watered plants was significantly different from that of stressed plants, with the former having more larger vessels than the latter. The pattern of vessel distribution frequency was different from that of percent total axial conductance (Kh) predicted with fewer large vessels carrying most of the axial flow.
Keywords:axial conductance  distribution frequency  grapevine (Vitis vinifera L. cv. Shiraz) roots  xylem vessels
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号