biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 54:395-399, 2010 | DOI: 10.1007/s10535-010-0072-5

Gibberellin retards chlorophyll degradation during senescence of Paris polyphylla

J. R. Li1,*, K. Yu1, J. R. Wei2, Q. Ma2, B. Q. Wang2, D. Yu1
1 Key Laboratory of Ministry of Education for Plant Developmental Biology, College of Life Sciences, Wuhan University, Wuhan, P.R. China
2 Yunnan Baiyao Group Company, Kunming, P.R. China

Chlorophyll (Chl) degradation was found to be related to the endogenous gibberellin (GA) content in shoots during senescence in the perennial plant Paris polyphylla var. yunnanensis (Franch.). Treatment with gibberellic acid (GA3) significantly increased the content of endogenous GAs (GA4 + GA7), retarded the senescence of shoots, and the degradation of proteins and Chl. Chlorophyllase, Mg-dechelation and peroxidase activities increased more in control plants than in those treated with GA3. GA3 treatment also protected lipoxygenase activity, which decreased significantly in control plants.

Keywords: chlorophyll catabolism; chlorophyllase; lipoxygenase; Mg-dechelation activity; peroxidase
Subjects: chlorophyll a,b; chlorophyllase; gibberellic acid, gibberellin; lipoxygenase; Paris polyphylla; peroxidase; proteins; senescence

Received: October 4, 2008; Accepted: March 11, 2009; Published: June 1, 2010  Show citation

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Li, J.R., Yu, K., Wei, J.R., Ma, Q., Wang, B.Q., & Yu, D. (2010). Gibberellin retards chlorophyll degradation during senescence of Paris polyphylla. Biologia plantarum, 54(2), 395-399. doi: 10.1007/s10535-010-0072-5
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