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Effect of Drought Stress on Physiological Characteristics of Three Moss Species(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2014年09期
Page:
78-82
Research Field:
Publishing date:

Info

Title:
Effect of Drought Stress on Physiological Characteristics of Three Moss Species
Author(s):
GUO Chun-hui; SHA Wei; LI Xiao-kai
Key Laboratory of Genetic Engineering,College of Life Science and Forestry,Qiqihar University,Qiqihar,Heilongjiang 161006
Keywords:
silica gel drought stress; Racomitrium japonicum; Grimmia pilifera; Tortula ruralis; physiological characteristics
PACS:
Q 945.78
DOI:
-
Abstract:
Taking three kinds of mosses including Racomitrium japonicum Dozy & Molk,Grimmia pilifera P.Beauv.and Tortula ruralis Gaertn as materials,three kinds of mosses were subjected to drought treatment by silica gel for three months of different time gradients,and the effect of drought stress on six physiological indexes of them including relative water content (RWC),malondialdehyde (MDA) content,POD activity,free proline (Pro) content,soluble protein (SP) content and soluble sugar (SS) content were studied.The results showed that the malondialdehyde content in the three mosses treated with silica drought stress was gradually decreased and then increased and reveals the same trend once again along with the relative water content reduced.POD activity of Tortula ruralis was lower than those of the other two mosses,and changes inconspicuously,while the POD activity of Racomitrium japonicum and Grimmia pilifera in different periods showed great changes.Among osmoregulation substances of the three moss species,the change of free proline content and soluble sugar (SS) content were inversely related,however,change of soluble protein (SP) content and POD activity was positively related.To some extent,the six physiological indexes indicated that the three mosses may have some special physiological mechanisms those were different from other plants.

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Last Update: 2014-08-13