Use of Potassium and Sucrose by Onion Guard Cells during a Daily Cycle of Osmoregulation

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概要

• 論文の詳細を見る

• Solute content of stomata from intact onion cotyle-dons grown under either greenhouse or growth chamber conditions was followed over the course of a daily light cycle to determine patterns of osmoregulation. Initial opening of stomata was well correlated with guard cell potassium accumulation under both growth conditions. Subsequently, however, there was a consistent decrease in guard cell potassium content despite constant or increasing aperture. Although a secondary increase in potassium was sometimes observed during the second half of the light cycle, guard cell potassium content was poorly correlated with aperture. Sucrose levels in guard cells increased 60% during the period of declining potassium content, suggesting its use as an alternate osmoticum. Guard cells are postulated to use multiple pathways for the production of osmotica over the course of a complete daily cycle of stomatal movements.

• 日本植物生理学会の論文

著者

• Zeiger Eduardo

  Department Of Organismic Biology Ecology And Evolution University Of California

• Talbott L

  Univ. California Ca Usa

• Zeiger E

  Univ. California Ca Usa

• Talbott Lawrence

  Department Of Organismic Biology Ecology And Evolution University Of California

• Amodeo Gabriela

  INGEBI, vuelta de obligado

• Amodeo Gabriela

  Ingebi Vuelta De Obligado

• Zeiger Eduardo

  Department Of Ecology And Evolutionary Biology University Of California

• Talbott Lawrence

  Department of Ecology and Evolutionary Biology, University of California

関連論文

• Use of Potassium and Sucrose by Onion Guard Cells during a Daily Cycle of Osmoregulation
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• Stomata from npq1, a Zeaxanthin-less Arabidopsis Mutant, Lack a Specific Response to Blue Light
• Reversal by Green Light of Blue Light-stimulated Stomatal Opening in Intact, Attached Leaves of Arabidopsis Operates Only in the Potassium-dependent, Morning Phase of Movement

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