• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2003 Fiscal Year Final Research Report Summary

Optimal flowering strategy in racemes

Research Project

Project/Area Number 14540573
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 生態
Research InstitutionTohoku University

Principal Investigator

SAKAI Satoki  Tohoku University, Graduate School of Life Sciences, Associate Prof., 大学院・生命科学研究科, 助教授 (90272004)

Project Period (FY) 2002 – 2003
Keywordsplant / raceme / flower / seed / optimal stratesy / trade-off / pollinator / cohort
Research Abstract

I analyzed the nature of size-number trade-off of offspring when multiple cohorts of such offspring are produced sequentially using a fixed amount of reserves. In the model, we incorporated sink-limitation in the resource absorption rate of offspring from the mother tissue and the loss of resources by maintenance respiration. We found that the later the initiation of a cohort, the greater the cost of producing a cohort with the same size and number of offspring. This is due to the loss of resources by maintenance respiration during the period from the beginning of reproduction to the initiation of the cohort. Also, the extra cost increases with an increase in the specific maintenance respiration rate. Thus, resources lost to respiration over time reduces the fitness value of producing late cohorts. Hence, it is advantageous of produce all offspring simultaneously unless there are fitness advantages of producing offspring sequentially which overcome this cost or constraints preventing simultaneous production. Sequentially offspring production evolves if there is a constraint on the number of offspring of each cohort.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] Ishii, HS, Sakai, S: "Effects of floral display size and floral position on individual floral longevity in racemes of Narthecium asiaticum (Liliaceae)"Functional Ecology. 15. 396-403 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Morinaga, SI, Sakai, S.: "Consequences of differences in flowering date in seed production in Heloniopsis orientalis (Liliaceae)"American Journal of Botany. 90. 1153-1158 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ishii, HS, Sakai, S.: "Effects of display size and position on individual floral longevity in racemes of Narthecium asiaticum (Liliaceae)"Functional Ecology. 15. 396-405 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Morinaga, SI, Sakai, S.: "Consequences of differences in flowering date in seed production in Heloniopsis orientalis (Liliaceae)"American Journal of Botany. 90. 1153-1158 (2003)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2005-04-19  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi