|Table of Contents|

Effect of Drought Stress on Physiological Indexes in Seedlings of Iris(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2012年16期
Page:
72-75
Research Field:
Publishing date:

Info

Title:
Effect of Drought Stress on Physiological Indexes in Seedlings of Iris
Author(s):
WANG BoDONG Ran
College of Horticulture,Jilin Agricultural University,Changchun,Jilin 130118
Keywords:
IrisPEG osmotic stressdrought resistancephysiological indexes
PACS:
S 682.1+9
DOI:
-
Abstract:
The drought method was taken by the Polyethylene glycol (PEG-6000) with four kinds of solution concentration: 0,10%,20% and 30%.Under the osmotic stress,Iris ensataIris setosa and Iris sanguinea in the Changbai Mountain area were researched,their relative membrane permeability (RP),proline(Pro) content and the changes of peroxidase (POD) activity were determined.The changes of the cell membrane permeability,osmoregulation substance and protective enzyme system of the three kinds of Iris seedlings and its injury process and stress responses to the plants under the water stress conditions were researched.The results showed that the sequence of drought resistance in three kinds of Iris plants from strong to weak was Iris sanguinea, Iris ensataIris setosa.After 36 h and 72 h under the osmotic stress,the relative membrane permeability of the leaves increased in varying degrees,with Iris setosalargest increase,the smallest increase in Iris sanguinea;proline (Pro) content increased with the increasing in the concentration of drought stress,the rate of increase in Iris sanguinea was smaller,the POD incresaed too.The rising amplitude of Iris sanguinea and Iris ensata were larger,and Iris setosa changed to gentle.Smaller membrane permeability and proline content with more POD activity could be three important indexes to the drought resistance of the Iris.

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Last Update: 2014-08-28