잠시만 기다려 주세요. 로딩중입니다.

Root system architecture and gravity perception of a mangrove plant,Sonneratia alba J. Smith

한국식물학회지 2004년 47권 3호 p.236 ~ 243
 ( Purnobasuki Hery ) - Tohoku University Graduate School of Sciences

 ( Suzuki Mitsuo ) - Tohoku University Graduate School of Sciences

Abstract


We describe the features of the root system and the gravitropism of roots produced bySonneratia alba. The root system consists of four root types with different growth directions: (a) Pneumatophores, which are negatively orthogravitropic and their statocytes are very large (922 μm2) and the statolith is located near the proximal wall, (b) Cable roots and (c) Feeding roots which are both diagravitropic and their statoliths are settled along the longitudinal wall, and (d) Anchor roots which are positively orthogravitropic. The statocyte cells are the smallest (420 μm2) and statoliths settled at the distal wall. We found that all roots with marked gravitropism have statoliths that settle along different walls of the statocyte. This implies that the statoliths sensing of gravity is done by gravity on mass, and that they are denser than surrounding cytoplasm and this position is related to root growth direction. This finding matches the statoliths sediment under the effect of gravity. Irrespective of statolith, position and direction of growth may be stable.

키워드

gravitropism; root architecture; Sonneratia alba; statolith
원문 및 링크아웃 정보
 
등재저널 정보