Physiological differences between desication-tolerent and desication-sensitive varieties of maize (Zea mays L.) during soil draught stress and rehydration
To determine the physiological differences between the drought-tolerant variety Danyu No. 13 and drought-sensitive variety Shannong No. 3 of maize during soil draught and following rewatering, physiological characteristics, including osmoregulation, cell elasticity regulation, stomatal conducance, p...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2002-05-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/1008-9209.2002.03.0249 |
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| Summary: | To determine the physiological differences between the drought-tolerant variety Danyu No. 13 and drought-sensitive variety Shannong No. 3 of maize during soil draught and following rewatering, physiological characteristics, including osmoregulation, cell elasticity regulation, stomatal conducance, photosynthetic rate, PS Ⅱ photochemical efficiency and ABA concentration in leaf were studied. During soil draught the drought-sensitive Shannong No. 3 showed less capabilities in osmoregulation and cell elasticity regulation, slower decrease in stomatal conducanc, and increase in ABA concentration, more rapid decline in photosynthetic rate and PS Ⅱ photochemical efficiency compared with drought-tolerant Danyu No. 13. After watering, Danyu No. 13 regained its prestress stomatal conducance, photosynthetic rate, PS Ⅱ photochemical efficiency faster than Shannong No. 3. So the conclusions can be drawn that: ① less damage occurred and more persistant capability of metabolism maintained with the more tolerant Danyu No. 13 during soil draught stress and after rewatering; ② differences in drought-tolerance was reflected in physiological difference; ③ ABA concentration may act as a physiological index for measuring drought-tolerance of maize. |
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| ISSN: | 1008-9209 2097-5155 |