TITLE:
Resistant Evaluation of Kiwifruit Rootstocks to Root Zone Hypoxia Stress
AUTHORS:
Yinfa Mi, Xiaowei Ma, Shuangchen Chen
KEYWORDS:
Kiwifruit Rootstock; Root Zone Hypoxia Stress; Resistant Evaluation
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.4 No.4,
April
25,
2013
ABSTRACT:
In this
thesis, 10 species of kiwifruit rootstocks were treated with hydroponics
hypoxia to study their root zone hypoxia tolerance. The results were as
follows: growth of all kiwifruit seedlings was inhibited. The max length of new
root, plant height, plant biomass, root activity, relative growth rate of
leaves, and content of chlorophyll in leaves under root zone hypoxia stress
obviously declined comparing with control. MDA content, relative conductance in
the leaves and roots all increased in 10 kinds of kiwifruit seedlings. The
sensitivities of 10 kinds’ kiwifruit seedlings to hypoxia stress were obviously
different. With the method of subordinate function and cluster analysis, the
adversity resistance coefficient of 10 kinds’ kiwifruit seedlings, were
comprehensively evaluated in order to appraise their hypoxia-tolerance abilities.
According to the results, “Hayward”, “Qinmei”, “Jinxiang”, “Kuoye”, “Huayou”
kiwifruit seedlings held higher tolerance to root zone hypoxia stress, while “Hongyang”
kiwifruit seedlings were sensitive to root zone hypoxia stress. The others,
including “Xixuan”, “Maohua”, “Jinhua”, “Shanli” kiwifruit seedlings kept
moderate resistant intensity to root zone hypoxia stress. The kiwifruit
seedlings’ resistance order
from strong to weak was: “Hayward” > “Qinmei” > “Jinxiang” > “Kuoye” > “Huayou” > “Xixuan” > “Maohua” > “Jinhua” > “Shanli” > “Hongyang”.