Articles

STUDIES OF DROUGHT RESISTANCE OF DIFFERENT GROUND-COVER CHRYSANTHEMUM VARIETY SEEDLINGS

Article number
937_40
Pages
329 – 335
Language
English
Abstract
Bred and selected through iterations of inter-species hybridization, seedling selection and mutation selection, ground-cover chrysanthemum (Chrysanthemum × morifolium Ramat.) is more resistant than normal chrysanthemum under cold, dry, shady or polluted conditions.
With the growing scarcity of water resources, it is becoming of great importance to breed and apply drought resistant varieties.
Based on this requirement, we undertook research on drought resistance indices of ground-cover chrysanthemum, with the aim to determine the relative drought resistance of eight important varieties.
Drought-stress investigations have been conducted on eight different specimens.
Physiological indices (proline content, conductivity, chlorophyll content) and photosynthetic characteristics indices (photosynthetic rate, transpiration rate, stomatal conductance) were measured.
Combined with morphological indices they were used to evaluate drought resistance of different varieties.
Results suggested that drought resistance in the eight varieties investigated was found to be, from strong to weak: ‘Pudijin’, ‘Beilinhong’, ‘Guoqingzi’, ’Liujinsuiyue’, ‘Chongbanwanhuang’, ‘Luojinqian’, ‘Xinhuang’ and ‘Jindinghongxin’. It is also concluded that to combine morphological characteristics, photosynthetic and physiological indices is an effective method in evaluation of drought-resistance abilities.
The study also sought to find out a method to evaluate overall drought resistance of chrysanthemum varieties cultivated in dry and alkaline soils of northern China.

Publication
Authors
Lu Miao, Sun Ming, Zhang Qi-Xiang
Keywords
photosynthetic indices, morphological indices
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