Document Detail

The behavior of pollination drop secretion in Ginkgo biloba L.
MedLine Citation:
PMID:  22899081     Owner:  NLM     Status:  MEDLINE    
Pollination drop (PD) secretion plays a critical role in wind pollination in many gymnosperms. We conducted detailed investigations on PD secretion in Ginkgo biloba, and found that PDs could not form when the micropyle was removed, but were able to form after removal of the shoot, leaves, ovular stalk, or ovular collar. The duration and volume of the PD increased under high relative humidity, but addition of salt or sugar did not affect PD secretion, its size, or its duration. Morphological and anatomical observations showed that many secretion cells at the nucellus tip contributed to secreting the PD after the formation of pollen chamber. Under laboratory conditions, the PD persisted for approximately 10 d if not pollinated, and re-formed five times after it was removed, with the total volume of PDs reaching approximately 0.4 μL. These results suggested that PDs can be continuously secreted by the tip of the nucellus cells during the pollination stage to increase the chance of capturing pollen from the air. Importantly, PD secretion is an independent behavior of the ovule and PDs were produced apoplastically.
Biao Jin; Xiaoxue Jiang; Di Wang; Lei Zhang; Yinglang Wan; Li Wang
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2012-08-17
Journal Detail:
Title:  Plant signaling & behavior     Volume:  7     ISSN:  1559-2324     ISO Abbreviation:  Plant Signal Behav     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-11-16     Completed Date:  2013-04-25     Revised Date:  2013-07-12    
Medline Journal Info:
Nlm Unique ID:  101291431     Medline TA:  Plant Signal Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1168-76     Citation Subset:  IM    
College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, China.
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MeSH Terms
Carbohydrates / pharmacology
Ginkgo biloba / drug effects,  physiology*
Ovule / drug effects,  physiology*
Pollen / physiology*
Sodium Chloride / pharmacology
Reg. No./Substance:
0/Carbohydrates; 7647-14-5/Sodium Chloride

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

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