Growth and physiological responses of four dwarf ornamental bamboo species under salt stress

Gu Hongyue, Zhou Rui, Tan Qin, Lin Shuyan, Yao Wenjing

Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 0

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南京林业大学学报（自然科学版）
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Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 0 DOI: 10.12302/j.issn.1000-2006.202512029

Growth and physiological responses of four dwarf ornamental bamboo species under salt stress

  • Gu Hongyue1,2,3, Zhou Rui1,2, Tan Qin1,2,3, Lin Shuyan1,2, Yao Wenjing1,2,*
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Abstract

【Object】 We aim to screen out relatively salt-tolerant bamboo species by comprehensive evaluation on the salt tolerance of four dwarf ornamental bamboo species, enriching the theoretical basis of bamboo plants in salt tolerance and promoting the ecological application of relatively salt-tolerant bamboo species in coastal Tideland. 【Method】 The NaCl concentration gradients were set up as follows: CK (0‰), T1 (1.5‰), T2(3‰), T3 (4.5‰) and T4 (6‰). The morphological and physiological indexes of each bamboo species were observed and measured on the 4th, 8th, 16th, 24th and 60th days after gradient concentration of salt treatment. The growth indicators of new bamboos were also measured in the second year. The salt tolerance of four dwarf ornamental bamboos was comprehensively analyzed by both membership function method and principal component analysis method based on the above indexes. 【Result】 Under different salt stress, Indocalamus decorus and Shibataea chinensis displayed preferable morphological phenotype, and low concentration of salt stress had a certain effect on promoting the growth of shoots and new bamboos. In addition, Indocalamus decorus and Shibataea chinensis could maintain relatively high antioxidant enzyme activity and osmotic regulation ability under low and medium salt stress. The salt tolerance of four dwarf ornamental bamboo species based on membership function values, from strong to weak, is as follows: Indocalamus decorus> Shibataea chinensis>Pleioblastus argenteostriata>Pleioblastus fortune. The result of principal component analysis is Shibataea chinensis > Indocalamus decorus>Pleioblastus fortunei>Pleioblastus argenteostriata. 【Conclusion】 The evaluation results of membership function method and principal component analysis showed a consistent overall trend in the salt tolerance of the four dwarf ornamental bamboo species. Indocalamus decorus and Shibataea chinensis were rated as relatively salt-tolerant, whereas Pleioblastus argenteostriata and Pleioblastus fortunei were assessed as salt-sensitive.

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dwarf ornamental bamboo / salt stress / growth indicators / physiological indexes / membership function method / principal component analysis

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Gu Hongyue, Zhou Rui, Tan Qin, Lin Shuyan, Yao Wenjing. Growth and physiological responses of four dwarf ornamental bamboo species under salt stress[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 0 https://doi.org/10.12302/j.issn.1000-2006.202512029

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