Effects of ABA on growth, leaf stomatal characteristics, and photosynthesis of Iris lactea seedlings under NaCl stress
[Objective] The effects of abscisic acid (ABA) on the growth, leaf stomatal characteristics, and photosynthesis of Iris lactea seedlings under severe salt stress were studied. We aim to screen the appropriate ABA concentration to enhance salt tolerance of I. lactea, and to provide a basis for the...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Science Press
2025-01-01
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| Series: | Xibei zhiwu xuebao |
| Subjects: | |
| Online Access: | http://xbzwxb.alljournal.net/xbzwxb/article/abstract/20240504?st=article_issue |
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| Summary: | [Objective] The effects of abscisic acid (ABA) on the growth, leaf stomatal characteristics, and
photosynthesis of Iris lactea seedlings under severe salt stress were studied. We aim to screen the appropriate
ABA concentration to enhance salt tolerance of I. lactea, and to provide a basis for the cultivation
of I. lactea that is tolerant to severe saline stress. [Methods] Using ‘ML04’ and ‘ML35’ I. lactea seedlings
as materials, the biomass, stomatal density, photosynthesis rate, and other indices under NaCl
stress after ABA spraying were analyzed. [Results] Under NaCl stress, both I. lactea seedlings showed
salt damage symptom, and the leaf damage of ‘ML35’ was more severe than ‘ML04’. Spraying of ABA
increased salt tolerance of the two I. lactea seedlings, and ‘ML04’ was increased more than ‘ML35’.
ABA increased the plant height and biomass by adjusting the stomatal morphology and spatial distribution
pattern to optimize the gas exchange process, reducing the decrease of chlorophyll content, and enhancing
its photosynthesis, etc. [Conclusion] The damage of ‘ML35’ was more severe than ‘ML04’ under salt
stress. Spraying ABA could alleviate the growth of I. lactea seedlings under salt stress, and 2.5 μmol/L
ABA had the best effect. |
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| ISSN: | 1000-4025 |