| Salt tolerance of Helianthus varieties at germination stage |
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| DOI：10.7606/j.issn.1000-7601.2011.04.06 |
| Key Words: salt tolerance salt stress germination stage Helianthus hydroponics |
| Author Name | Affiliation | | WANG Jing | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | ZHAO Yonggan | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | PANG Huancheng | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | REN Tianzhi | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | LI Yuyi | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China |
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| Abstract: |
| The effect of NaCl on Helianthus seed germination after treated with different NaCl concentrations (0、0.10%、0.20%、0.30%、0.40%、0.50%、0.60%) were studied with Helianthus cultivars SH909，RH3146，RH318，DC6009，RH118 and 135. With different NaCl concentrations，the germination percentage，the relative germination percentage，seed potentiality，germination index，the relative root length were calculated．Changes in some physiological indexes derived from the embryos of Helianthus were measured under salt stresses. The salt tolerance characteristic and membership function were comprehensively evaluated with all above traits．The results showed that salt tolerance characteristic of different Helianthus cultivars were differential. The salt tolerance order of six varieties of Helianthus was：RH118＞RH3146＞RH318＞135＞SH909＞DC6009．RH118 was the most salt tolerant variety and the limit germination ratio was 0.47%, showed strong germination ability and embryos grow ability. Second is RH3146, the limit germination ratio was 0.
41%, showed more strong embryos grow ability. The effect of low concentration of NaCl treatment (NaCl≤0.10%) on Helianthus seed germination was relatively small. Under higher concentrations of salt（NaCl≥0.20%）, the overall trend was that the germination percentage，seed potentiality，germination index and root growth of different Helianthus seeds decreased with increasing salt content．The physiological reaction of different varieties was different under salt stress. |
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