|Table of Contents|

Effect of Shading on Physiological Characteristic of ‘Wen 185’ Walnut Leaves(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年18
Page:
28-34
Research Field:
Publishing date:

Info

Title:
Effect of Shading on Physiological Characteristic of ‘Wen 185’ Walnut Leaves
Author(s):
ZHANG Shubin1; 2; ZHANG Rui1; 2; XU Chongzhi1; 2; GUO Liuyang3; GAO Shan3; GUO Long4; ZHANG Jianliang4
1.Xinjiang Production and Construction Corps of Xinjiang Characteristic Fruit Production Engineering Laboratory，Alar，Xinjiang 843300；2.Xinjiang Production and Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin，Alar，Xinjiang 843300；3.College of Plant Science and Technology，Tarim University，Alar，Xinjiang 843300；4.Xinjiang Production and Construction Corps First Division of the 3 Forestry Station，Alar，Xinjiang 843011
Keywords:
walnut; growth period; light; physiological index; leaf anatomical structure
PACS:
-
DOI:
10.11937/bfyy.20170423
Abstract:
Walnut is a kind of tall tree and closely cultivated species in agricultural production，so is shaded seriously among tree body.Our aim is to explore the effects of severe shading on walnut trees.‘Wen 185’ walnut cultivars were selected as the test material and with white nylon mesh for their artificial shade in the walnut leaf stage.The effects of different light treatments on physiological indexes and leaf anatomical structure of leaves were studied.The results showed that，shading for a short time，43% lighting conditions will improve Chl(a+b) contents of walnut′s leaves.For a long time，Chl(a+b) contents will be limited when light was lower 69% lighting conditions，and the light reached 84% of natural light，it could improve the growth of Chl(a+b) contents.Variance analysis showed that the proline contents of 100% natural light was significantly higher than that of shading conditions.On the other hand，shading reduced the water potential and MDA.The length and size of stomata of 84% lighting condition were significantly higher than that of CK.With the increased of shade degree，the length of epidermal cell，thickness of the upper and lower epidermis，sponges tissue thickness，palisade tissue thickness，ratio of spongy tissue and palisade tissue，stomatal density and area were decreased，stomatal length became longer.The conclusion was，for a short time of sever shade would not affect the walnut，if a long time shading on the walnut tree，when the light was lower than 69%,it could inhibit the growth of walnut，however slight shade (84% light conditions) would promote physiological effects in walnut trees.

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Last Update: 2017-10-01