| 要旨トップ | 目次 | 日本生態学会第59回全国大会 (2012年3月,大津) 講演要旨
ESJ59/EAFES5 Abstract


一般講演(ポスター発表) P3-068A (Poster presentation)

Compensatory reproductive responses in a monocarpic perennial herb Cardiocrinum cordatum var. glehnii (Liliaceae)

*Tani, T. (Joetsu Univ. Edu.), Kudo, G., Fujita, H., Takahashi, H. (Hokkaido Univ.)

Cardiocrinum cordatum var. glehnii produces several flowers on a tall stalk after vegetative stage over several years from a seedling stage. This species often forms daughter bulbs as asexual propagules. Regulation of reproductive allocation between the sexual and asexual organs has been unclear in this species. Complete abortion of flowers or immature fruits is sometimes observed under natural conditions due to herbivory damage, irrespective of a monocarpic mating system. To examine the reproductive allocation and compensatory responses to the abortion, a field experiment of three flower-bud removal treatments within a plant (full, half, and intact) was conducted. Total plant mass showed no significant difference among three treatments, indicating a complete compensation for the flower abortion. Weight of daughter bulbs significantly increased in the full-disbudding plants compared with the intact plants, while it did not increase in the half-disbudding plants. Instead, number, weight and wing area of intact seeds in the remained fruits were significantly increased in the half-disbudding plants. Allocation to seeds would have priority over that to asexual propagules if some fruits are formed after partial reproductive failure.


日本生態学会