stomata opening

목차

1. Title
2. Object
3. Introduction
4. Material & Methods
5. Result
6. Discussion
7. Further study
8. Reference

본문내용

1. Title : The Mechanisms of Stomatal Opening

2. Object
Understanding the effect of K+ and ABA to stomatal opening

3. Introduction

[Transpiration]

Transpiration is a process similar to evaporation. It is a part of the water cycle, and it is the loss of water vapor from parts of plants (similar to sweating), especially in leaves but also in stems, flowers and roots. Leaf surfaces are dotted with openings which are collectively called stomata, and in most plants they are more numerous on the undersides of the foliage. The stomata are bordered by guard cells that open and close the pore.

<중 략>

Vacuoles are large intracellular storage organelles in plants cells. In addition to the ion channels in the plasma membrane, vacuolar ion channels have important functions in regulation of stomatal opening and closure because vacuoles can occupy up to 90% of guard cell’s volume. Therefore, a majority of ions are released from vacuoles when stomata are closed. Vacuolar K+ (VK) channels and fast vacuolar channels can mediate K+ release from vacuoles. Vacuolar K+ (VK) channels are activated by elevation in the intracellular calcium concentration. Another type of calcium-activated channel, is the slow vacuolar (SV) channel. SV channels have been shown to function as cation channels that are permeable to Ca2+ ions, but their exact functions are not yet known in plants.

참고 자료

http://en.wikipedia.org/wiki/Guard_cell
http://en.wikipedia.org/wiki/Stoma
http://en.wikipedia.org/wiki/Transpiration
http://www.eoearth.org/article/Stomata?topic=58074
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC396885/pdf/plntphys00190-0065.pdf