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150325s2001 xx |||||o 00| ||eng c |
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|a (DE-627)JST066563399
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|a (JST)4279720
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Van Der Straeten, Dominique
|e verfasserin
|4 aut
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| 245 |
1 |
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|a A Comparative Molecular-Physiological Study of Submergence Response in Lowland and Deepwater Rice
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|c 2001
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|a Text
|b txt
|2 rdacontent
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|a Computermedien
|b c
|2 rdamedia
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|a Online-Ressource
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|a Survival of rice (Oryza sativa) upon an extreme rise of the water level depends on rapid stem elongation, which is mediated by ethylene. A genomic clone (OS-ACS5) encoding 1-aminocyclopropane-1-carboxylic acid (ACC) synthase, which catalyzes a regulatory step in ethylene biosynthesis, has been isolated from cv IR36, a lowland rice variety. Expression was induced upon short- and long-term submergence in cv IR36 and in cv Plai Ngam, a Thai deepwater rice variety. Under hypoxic conditions, abscisic acid and gibberellin had a reciprocal opposite effect on the activity of OS-ACS5. Gibberellin up-regulated and abscisic acid down-regulated OS-ACS5 mRNA accumulation. Growth experiments indicated that lowland rice responded to submergence with a burst of growth early on, but lacked the ability to sustain elongation growth. Sustained growth, characteristic for deepwater rice, was correlated with a prolonged induction of OS-ACS5. In addition, a more pronounced capacity to convert ACC to ethylene, a limited ACC conjugation, and a high level of endogenous $\text{gibberellin}_{20}$ were characteristic for the deepwater variety. An elevated level of OS-ACS5 messenger was found in cv IR36 plants treated with exogenous ACC. This observation was concomitant with an increase in the capacity of converting ACC to ethylene and in elongation growth, and resulted in prolonged survival. In conclusion, OS-ACS5 is involved in the rapid elongation growth of deepwater rice by contributing to the initial and long-term increase in ethylene levels. Our data also suggest that ACC limits survival of submerged lowland rice seedlings.
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|a Copyright 2001 American Society of Plant Physiologists
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4 |
|a Biological sciences
|x Agriculture
|x Agricultural sciences
|x Agronomy
|x Crops
|x Field crops
|x Food crops
|x Grains
|x Cereal grains
|x Rice
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| 650 |
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4 |
|a Biological sciences
|x Biology
|x Botany
|x Plants
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| 650 |
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4 |
|a Biological sciences
|x Biology
|x Developmental biology
|x Growth and development
|x Developmental stages
|x Seedlings
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| 650 |
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4 |
|a Physical sciences
|x Earth sciences
|x Geography
|x Geomorphology
|x Topography
|x Lowlands
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| 650 |
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4 |
|a Physical sciences
|x Chemistry
|x Chemical compounds
|x Chemicals
|x Acids
|x Nucleic acids
|x RNA
|x Messenger RNA
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| 650 |
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4 |
|a Physical sciences
|x Chemistry
|x Chemical compounds
|x Chemicals
|x Acids
|x Nucleic acids
|x DNA
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| 650 |
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4 |
|a Physical sciences
|x Chemistry
|x Chemical compounds
|x Chemicals
|x Acids
|x Nucleic acids
|x RNA
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| 650 |
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4 |
|a Health sciences
|x Medical conditions
|x Symptoms
|x Physical symptoms
|x Respiratory symptoms
|x Hypoxia
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| 650 |
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4 |
|a Biological sciences
|x Biology
|x Genetics
|x Genomics
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| 650 |
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4 |
|a Biological sciences
|x Biology
|x Botany
|x Plant physiology
|x Plant growth
|x Environmental Stress and Adaptation
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| 655 |
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4 |
|a research-article
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| 700 |
1 |
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|a Prinsen, Els
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Van Montagu, Marc C.
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Plant Physiology
|d American Society of Plant Biologists, 1926
|g 125(2001), 2, Seite 955-968
|w (DE-627)314092579
|w (DE-600)2004346-6
|x 15322548
|7 nnns
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| 773 |
1 |
8 |
|g volume:125
|g year:2001
|g number:2
|g pages:955-968
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|u https://www.jstor.org/stable/4279720
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|d 125
|j 2001
|e 2
|h 955-968
|