Hydraulically based stomatal oscillations and stomatal patchiness in Gossypium hirsutum

Functional Plant Biology : FPB
Ricardo A MarencoMarilyn C Ball

Abstract

Slow stomatal oscillations (70-95 min), associated with feedback within the plant hydraulic systems, were studied in cotton (Gossypium hirsutum L.). Oscillations were only evident when the whole plant was exposed to light, and were not influenced by reductions in intercellular CO2 concentrations (Ci) in intact, attached leaves. Oscillations were synchronised among different leaves of the same plant, even when the leaf-to-air vapour pressure difference (VPD) was reduced in a cuvette enclosing one of the leaves. In the trough phase of stomatal oscillations the apparent Ci was higher than expected from the combination of the observed assimilation rate and the A(Ci) relationship measured in the absence of oscillations. Using chlorophyll fluorescence imaging we found evidence of stomatal heterogeneity in this phase. Finally, we found that stomatal oscillations appeared to be correlated with xylem embolism, with more vessels filled with gas at the peak than at the troughs of stomatal oscillations.

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Citations

Dec 8, 2011·Plant, Cell & Environment·T W OcheltreeP V V Prasad
Jan 18, 2017·Plant, Cell & Environment·Yotam ZaitAmnon Schwartz
Oct 19, 2017·Tree Physiology·Alvaro López-BernalFrancisco J Villalobos
Aug 1, 2014·Functional Plant Biology : FPB·Andrea LeighMarilyn C Ball
Mar 19, 2008·Physiologia Plantarum·Andrea NardiniSebastiano Salleo
Feb 21, 2008·Plant, Cell & Environment·Andrea NardiniSebastiano Salleo
Jan 1, 2019·Functional Plant Biology : FPB·Trevor BallardKeith Mott
Aug 31, 2021·Plant Signaling & Behavior·Liv S Severino

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