Physiological Response of Corn Seedlings to Wind Blowing

doi:10.7522/j.issn.1000-694X.2014.00171

JOURNAL OF DESERT RESEARCH ›› 2016, Vol. 36 ›› Issue (1): 71-77.DOI: 10.7522/j.issn.1000-694X.2014.00171

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Physiological Response of Corn Seedlings to Wind Blowing

Li Jin¹, Zhao Halin¹, Zhou Ruilian², Qu Hao¹, Yun Jianying¹, Pan Chengchen¹

1. Cold and Arid Regions Environment and Engineering Institute, Chinese Academy Sciences, Lanzhou 730000, China;
2. Faculty of Life Sciences, Ludong University, Yantai 264025, Shandong, China

Received:2014-10-29 Revised:2014-12-22 Online:2016-01-20 Published:2016-01-20

Abstract

Abstract: The seedlings of corn are often damaged by strong wind in the spring in semi-arid wind-eroded area of the Northeast, China. In order to understand physiological responses of the corn seedlings to wind blowing, a field wind-blowing experiment using a wind speed gradient of 0 (CK), 6, 9, 12, 15, and 18 m·s^-1 and 10 min of wind blowing times was conducted and changes of relative water content (RWC), malondialdehyde (MDA), membrane permeability, protective enzymes activities and osmotic regulation substances contents of corn seedlings were investigated in 2012 in the Horqin Sandy Land of Inner Mongolia. The results showed that: (1) RWC was significantly higher in the wind treatments than that in the CK, with an increased magnitude of 10.10%-26.52%, which suggested no water stress occurred in the wind blowing process; (2) compared to the CK, MDA contents were higher and membrane permeability were lower in the all wind treatments, but the differences among them and the CK were not significant, which suggested that membrane lipid peroxidation under wind blowing stress was not serious; (3) with increase of wind speed, activities of the CAT and SOD increased firstly and then decreased. CAT activity increased by 35.53% with the highest value in the 9 m·s^-1 treatment, and decreased by 40.98% in 15 m·s^-1 and 52.46% in the 18 m·s^-1 treatments, respectively, compared to CK. SOD activity showed a significantly increased trend from 6 m·s^-1 to 15 m·s^-1 treatments, with an increased magnitude of 40.49%-140.61% compared to CK. POD activity increased by 97.69% and 106.41% in the 6 m·s^-1 and 18 m·s^-1 treatments compared to CK, respectively; (4) Proline and soluble sugar contents increased by 32.15% and 35.08% in the 6 and 18 m·s^-1 treatments compared to the CK, which played osmotic adjustment role under wind blowing stress. Proline and soluble sugar did not play role in osmotic adjustment in the other wind treatments>

Key words: corn seedling, wind blow, membrane lipid peroxidation, protective enzymes, osmotic regulation substances

CLC Number:

S513

Li Jin, Zhao Halin, Zhou Ruilian, Qu Hao, Yun Jianying, Pan Chengchen. Physiological Response of Corn Seedlings to Wind Blowing[J]. JOURNAL OF DESERT RESEARCH, 2016, 36(1): 71-77.

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Physiological Response of Corn Seedlings to Wind Blowing

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