Circumnutation on the water surface: Female flowers of Vallisneria

Keiko Kosuge, Satoko Iida, Kiyoshi Katou, Tetsuro Mimura

研究成果: Article同行評審

13 引文 斯高帕斯(Scopus)

摘要

Circumnutation, the helical movement of growing organ tips, is ubiquitous in land plants. The mechanisms underlying circumnutation have been debated since Darwin's time. Experiments in space and mutant analyses have revealed that internal oscillatory (tropism-independent) movement and gravitropic response are involved in circumnutation. Female flower buds of tape grass (Vallisneria asiatica var. biwaensis) circumnutate on the water surface. Our observations and experiments with an artificial model indicated that gravitropism is barely involved in circumnutation. Instead, we show that helical intercalary growth at the base of peduncle plays the primary role in all movements in Vallisneria. This growth pattern produces torsional bud rotation, and gravity and buoyancy forces have a physical effect on the direction of peduncle elongation, resulting in bud circumnutation on the water surface. In contrast to other water-pollinated hydrophilous plants, circumnutation in Vallisneria enables female flowers to actively collect male flowers from a larger surface area of water.

原文English
文章編號1133
期刊Scientific reports
3
DOIs
出版狀態Published - 2013

All Science Journal Classification (ASJC) codes

  • 多學科

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