Skip Navigation


AOBPreview originally published online on May 30, 2006
Annals of Botany 2006 98(2):397-402; doi:10.1093/aob/mcl111
This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow All Versions of this Article:
98/2/397    most recent
mcl111v1
Right arrow E-letters: Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when E-letters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (1)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by BAI, W.-N.
Right arrow Articles by ZHANG, D.-Y.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by BAI, W.-N.
Right arrow Articles by ZHANG, D.-Y.
Agricola
Right arrow Articles by BAI, W.-N.
Right arrow Articles by ZHANG, D.-Y.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?


© The Author 2006. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Flowering Phenology and Wind-pollination Efficacy of Heterodichogamous Juglans mandshurica (Juglandaceae)

WEI-NING BAI, YAN-FEI ZENG, WAN-JIN LIAO and DA-YONG ZHANG*

Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering and Institute of Ecology, Beijing Normal University, Beijing 100875, China

* For correspondence. E-mail zhangdy{at}bnu.edu.cn

Received: 14 February 2006    Returned for revision: 9 March 2006    Accepted: 27 March 2006    Published electronically: 30 May 2006

• Background and Aims Heterodichogamy differs from normal dichogamy, in that it involves two mating types (protogyny and protandry) that occur at a 1 : 1 ratio in a population. Flowering phases of the two mating types are synchronized and reciprocal, which was considered to ensure between-type outcrossing. This study aims to quantify the flowering pattern and pollination efficacy in Juglans mandshurica, a wind-pollinated heterodichogamous tree.

• Methods The pattern of flowering phenology was monitored within individual trees and pollen traps were used to measure air-borne pollen loads during the spring in 2003 and 2004. Pollen longevity was determined by staining technique. Also a pollen supplementation experiment was performed in 2004 to assess pollen limitation of fruit production.

• Key Results There was no overlap between sexual functions within individual trees. Flowering periods of the two mating types were reciprocal and synchronous in both 2003 and 2004. Air-borne pollen loads were large, and protogynous and protandrous individuals each produced a high pollination peak, consistent with the two blooming periods. Maximum pollen longevity was about 4 h for protandrous individuals, and 3 h for protogynous individuals. Pollen supplementation did not increase fruit production in either protogynous or protandrous individuals.

• Conclusions Heterodichogamous flowering in Juglans mandshurica effectively avoids selfing, promotes between-type outcrossing, and leads to efficient pollination in a natural population.

Key words: Heterodichogamy, Juglans mandshurica, protandry, protogyny, pollination efficacy


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 J Exp BotHome page
Flowering Newsletter bibliography for 2006
J. Exp. Bot., April 20, 2007; (2007) erm028v2.
[Full Text] [PDF]


Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.