Phytochrome-mediated swelling of etiolated leaf protoplasts and its possible biological significance

Red light, mediated by the photoreceptor phytochrome, induces maize leaf unrolling as well as leaf expansion. Protoplasts prepared from maize leaves still in the rolled condition swell in a red-far red photoreversible manner indicating that phytochrome mediates this phenomenon. To determine if proto...

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Bibliographic Details
Published inPlant cell reports Vol. 9; no. 8; pp. 435 - 438
Main Authors Zhou, S, Jones, A.M, Scott, T.K
Format Journal Article
LanguageEnglish
Published Germany 01.12.1990
Subjects
coleoptiles
growth rate
leaf unrolling
leaves
phytochrome
Pisum sativum
protoplasts
red light
regulation
swelling
Zea mays
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Summary:Red light, mediated by the photoreceptor phytochrome, induces maize leaf unrolling as well as leaf expansion. Protoplasts prepared from maize leaves still in the rolled condition swell in a red-far red photoreversible manner indicating that phytochrome mediates this phenomenon. To determine if protoplast swelling is related to leaf unrolling, leaf expansion, or both, we compared red-light induced swelling of protoplasts from rolled maize leaves to protoplasts prepared from tissues that are known to grow in response to light but do not unroll. We also compared the swelling response of protoplasts from rolled vs. unrolled leaves. In all cases, we found that swelling correlated with the unrolling response and not leaf expansion.
ISSN:0721-7714
1432-203X
DOI:10.1007/BF00232267