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Study on Drought Resistance at Germination Stage of 12 Varieties of Poa pratensis L.under PEG-6000 Stress(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2012年24期
Page:
54-58
Research Field:
Publishing date:

Info

Title:
Study on Drought Resistance at Germination Stage of 12 Varieties of Poa pratensis L.under PEG-6000 Stress
Author(s):
WANG Bin1; LI Chang-ding2; LAN Jian1; MA Zhong-ze3; XU Xing1
1.School of Agriculture，Ningxia University，Yinchuan，Ningxia 750021;
2.Bureau of Linyi Science and Technology，Linyi，Shandong 276000;
3.Ningxia Heng’an Construct Supervision Consultation Co.，LTD，Yinchuan，Ningxia 750001
Keywords:
Poa pratensis L.;  germination stage;  drought stress;  drought resistance;  PEG-6000
PACS:
S 68
DOI:
-
Abstract:
12 varieties of Poa pratensis L.were treated with PEG-6000 solution at concentrations of 0(CK)、-0.3、-0.6、-0.9 and -1.2 MPa in order to assess the effects of drought on relative germination rate，ratio of radicle and embryo，germination index as well as drought-tolerance index at germination stage.The results showed that the suitable water potential of Poa pratensis germination was more than or equal to -0.46 MPa and the critical water potential of drought tolerance of Poa pratensis probably around -0.6 MPa at germination stage.At last，the method of comprehensive clustering analysis was used to evaluate the different tolerance of the experimented varieties and the result was ‘Apollo’，‘Freedom Ⅱ’ and ‘Super icelly’ had better drought resistance，‘Big bound’，‘Resplendence’ and ‘Midnight Ⅱ’ had good drought resistance，‘Mission’，‘America king’ and ‘Impact’ were middle，‘Bluemoon’，‘Award’ and ‘Broad elegant’ had worse drought resistance.

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Last Update: 2014-08-31