Effect of Drought Stress on Imbibition, Germination and Seedling Growth of Nitraria tangutorum

doi:10.7522/j.issn.1000-694X.2013.00418

JOURNAL OF DESERT RESEARCH

2014, Vol. 34

Issue (6): 1537-1543 DOI: 10.7522/j.issn.1000-694X.2013.00418

Effect of Drought Stress on Imbibition, Germination and Seedling Growth of Nitraria tangutorum

Luo Guanghong^1,2, Wang Jin^{1 2 3}, Yan Xia¹, Chen Nenghai¹, Zhang Yong^1,2

1. Kaiyuan Biotechnology Center/Gansu Engineering Research Center for Microalgae, Hexi University, Zhangye 734300, Gansu, China;
2. College of Agriculture and Biotechnology, Hexi University, Zhangye 734300, Gansu, China;
3. Key Laboratory of Hexi Corridor Resources Utilization of Gansu, Hexi University, Zhangye 734300, Gansu, China

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Abstract Taking seeds of Nitraria tangutorum that grows in the desert region as materials, we investigated the characteristics of seed water-absorbing, germination and seedling growth under different osmotic potential conditions (-0.05, -0.148, -0.295, -0.490, -0.734, -1.032 MPa) by PEG-6 000 being adopted as simulant drought. Results showed that the seeds of N. tangutorum had a high water absorption speed and high efficiency, and quantity of 3 h water absorption increased with the decreasing of water potential. Since the degree of drought was intensified, germination rate, germination index, vigor index of N. tangutorum decreased and starting days of germination delayed. Height of the primary buds and quantity of seedling growth showed a decrease trend, while dry weight, root dry weight and root cap ratio of seedling showed a trend of rise after descending. Tthe appropriate drought stress could improve the drought resistance of the seedling of N. tangutorum, and was also conducive to cultivate strong seedling. Germination of N. tangutorum was sensitive and drought-resistible to changes of water, and the lowest osmotic potential for seed germination was -0.490 MPa. Because of drought stress, seeds of failing to germinate had a high germination rate after rehydration. Our results suggested that the responses to drought stresses of the seeds from species played an essentially ecological role in the seedling establishment and population regeneration. However, the key step to ensure the successful planting was to guarantee the soil moisture in the course of artificial cultivation.

Key words: Nitraria tangutorum water absorption rate germination rate drought stress

Received: 09 September 2013 Published: 20 November 2014

ZTFLH:

Q948.11

Corresponding Authors: 王进(Email:wangji810@163.com) E-mail: wangji810@163.com



	Articles by authors
	Luo Guanghong
	Wang Jin
	Yan Xia
	Chen Nenghai
	Zhang Yong

Cite this article:

Luo Guanghong, Wang Jin, Yan Xia, Chen Nenghai, Zhang Yong. Effect of Drought Stress on Imbibition, Germination and Seedling Growth of Nitraria tangutorum. JOURNAL OF DESERT RESEARCH, 2014, 34(6): 1537-1543.

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http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00418 OR http://www.desert.ac.cn/EN/Y2014/V34/I6/1537

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