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Effect of Different Nitrogen Levels on Growth，Photosynthetic Characteristics and Reactive Oxygen Scavenging Capacity of Cichorium endivia L.(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2016年15
Page:
21-26
Research Field:
Publishing date:

Info

Title:
Effect of Different Nitrogen Levels on Growth，Photosynthetic Characteristics and Reactive Oxygen Scavenging Capacity of Cichorium endivia L.
Author(s):
MA Yadong1; 2; LIU Huiying1; 2; ZHANG Xiaoqian1; 2; LIU Yaping1; 2; DIAO Ming1; 2
（1.College of Agronomy，Shihezi University,Shihezi，Xinjiang 832000；2.Key Laboratory of Special Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization of Xinjiang Production and Contruction Crops，Shihezi，Xinjiang 832003）
Keywords:
Cichorium endivia L.; nitrogen level; growth; photosynthetic characteristics; reactive oxygen scavenging capacity
PACS:
-
DOI:
10.11937/bfyy.201615005
Abstract:
With Cichorium endivia L.as test material，hydroponic experiments were conducted to investigate the effects of different nitrogen levels on plant growth and root activity，as well as chlorophyll relative content (SPAD value)，photosynthetic gas exchange parameters，the contents of H2O2 and malondialdehyde (MDA) and active oxygen scavenging capacity in leaves of endive.The results showed that，the growth of endive plants under 8 mmol?L-1(N8) nitrogen level treatment was the best among of five different nitrogen treatments，which was related to the higher root activity，SPAD value，net photosynthetic rate (Pn) and reactive oxygen species scavenging capability，as well as lower membrane lipid peroxidation in endive plants.Furthermore，the application of low nitrogen (2 mmol?L-1,5 mmol?L-1) or high nitrogen level (11 mmol?L-1,14 mmol?L-1) decreased Pn and inhibited the growth of endive plants in different degree likely due to the decrease in root activity and leaf photosynthetic pigment content and the damage in structure and function of cell membrane caused by the decrease of active oxygen scavenging capacity，which resulted in the accumulation of H2O2 and membrane lipid peroxidation enhancement.

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Last Update: 2016-08-24