| Interactions between nitric oxide and aquaporin in seed germination of wheat |
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| DOI：10.7606/j.issn.1000-7601.2013.04.019 |
| Key Words: nitric oxide(NO) aquaporin(AQP) seed germination wheat |
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| Abstract: |
| In order to explore the interactions between nitric oxide (NO) and aquaporin (AQP) in seed germination, two wheat varieties including Shaanhe No.6 (SH6, drought-resistant) and Zhengying No.1 (ZY1, drought-susceptible) were adopted to study the effects of H2O, HgCl2(500 μM), PEG (PEG-8000, -0.35 MPa), SNP (0.5 mM), SNP+PEG and SNP+HgCl2 solution soaking on seed germination. The results showed that SNP (NO donor) promoted seed germination of the drought-resistant variety, while inhibited that of the drought-susceptible variety. AQP played a more important role in the drought-susceptible variety than in the drought-tolerance variety. NO could relieve the inhibition of seed germination caused by drought or aquaporin inhibitor (HgCl2). The inhibition degree of stress to germination of the seeds being imbibed was smaller than that of the seeds being germinated directly. NO could regulate the activity of AQP, and both NO and AQP exerted their role mainly in the initial 12 h of germination. |
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