Document Detail

Cyclic pollen production in Cedrus deodara.
MedLine Citation:
PMID:  20033456     Owner:  NLM     Status:  MEDLINE    
Based on a seven-year study of pollen production and release in two different natural populations of Cedrus deodara from Garhwal Himalaya, India, we determined that pollen output follows a two-year cycle. Pollen productivity determinations considered various sources of variability, including the number of pollen strobili per branch, strobili per tree, microsporophylls per tree and pollen grains per tree. Each of these parameters revealed significant year-to-year and population effects. Microsporangium dehiscence took from 2.5 to 3.5 days. Maximum dehiscence was observed between 12:00 and 14:00 h, which coincides with diurnal highest temperature and lowest relative humidity. Annual production of pollen per tree varied from averages of 4.7 x 10(9), 7.2 x 10(9) and 5.1 x 10(9) in years of low production, with alternate high years, producing 12.6 x 10(9), 14.1 x 10(9), 13.3 x 10(9) and 14.0 x 10(9) pollen grains per tree. Annual pollen production in individual trees of C. deodara ranged from 1.4 x 10(9) to 22.3 x 10(9).
Vinod Prasad Khanduri; Chandra Mohan Sharma
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Publication Detail:
Type:  Journal Article     Date:  2009-01-01
Journal Detail:
Title:  Sexual plant reproduction     Volume:  22     ISSN:  1432-2145     ISO Abbreviation:  Sex. Plant Reprod.     Publication Date:  2009 Jun 
Date Detail:
Created Date:  2009-12-24     Completed Date:  2010-02-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100955730     Medline TA:  Sex Plant Reprod     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  53-61     Citation Subset:  IM    
Department of Forestry, Mizoram University, Aizawl, Mizoram, India.
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MeSH Terms
Cedrus / physiology*
Pollen / physiology*
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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