NaCl markedly improved the reproductive capacity of the euhalophyte Suaeda salsa
Jianrong Guo A , Yandi Li A , Guoliang Han A , Jie Song A and Baoshan Wang A B
+ Author Affiliations
- Author Affiliations
A Key Lab of Plant Stress Research, College of Life Sciences, Shandong Normal University, Ji’nan, Shandong, 250014, PR China.
B Corresponding author. Email: bswang@sdnu.edu.cn
Functional Plant Biology 45(3) 350-361 https://doi.org/10.1071/FP17181
Submitted: 27 June 2017 Accepted: 23 September 2017 Published: 16 October 2017
Abstract
The effect of NaCl on reproductive development was investigated in euhalophyte Suaeda salsa L. under controlled conditions. Results showed that NaCl promoted the reproductive growth of S. salsa and 200 mM NaCl was optimal. This was reflected in the increases of seed yield, seed number, flower number per plant and leaf axil, 1000 seed weight, as well as a decrease in flower abortion percentage with supply of NaCl. NaCl reduced the flower abortion percentage by increasing stigma receptivity instead of pollen viability. The Na+ and Cl– concentration in petals, stems and leaves were increased significantly but slightly in stamen and pistil. In contrast, the K+ concentration decreased markedly in leaves, stems and petals but a little in stamen and pistil. The Na+ and Cl– concentrations also increased significantly in seed from mother plants exposed to NaCl, whereas K+ decreased. However, seed quality was not influenced. Our results showed that high concentration of NaCl markedly increases the seed number and quality of S. salsa primarily via increasing flower number and fertility and S. salsa develops strategy to maintain ion homeostasis in reproductive organs for the generation. These factors play a pivotal role in setting up plant populations in saline environment.
Additional keywords: ion concentration, reproductive success, salt.
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