Automated targeting for inter-plant water integration

The measurement of plant water status such as leaf water potential (LWP) and leaf relative water content (RWC) is important part of understanding plant physiology and biomass production. Preliminary study was made to determine the optimum amount of leaf abrasion and equilibration time of sweet potato leaf inside the thermocouple psychrometer chambers. Based on the trial, the standard equilibration time curve of a Peltier thermocouple for sweet potato leaf was between 2 and 3 hours. To increase the water vapour conductance across the leaf epidermis the waxy leaf cuticle should be removed or broken by abrasion. The result showed that 4 times leaf rubbings was accepted as the most effective way to increase leaf vapour conductance of sweet potato in the psychrometer chambers. In calculating the leaf relative water content, unstressed water of sweet potato leaves require 4 hours imbibition, whereas water stressed of sweet potato leaves require 5 to 6 hours to reach the saturation time. Either leaf water potential or relative water content can be used as a parameter for plant water status in sweet potato.

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Faculty Opinions recommendation of The importance of nutritional regulation of plant water flux.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1168092.630212 ◽

2009 ◽

Author(s):

Christian Körner

Keyword(s):

Water Flux ◽

Plant Water ◽

Nutritional Regulation

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Water integration between mother and daughter ramet of Alhagi sparsifolia

Chinese Journal of Plant Ecology ◽

10.3724/sp.j.1258.2013.00017 ◽

2013 ◽

Vol 37 (2) ◽

pp. 164-172 ◽

Cited By ~ 1

Author(s):

Wei-Cheng LUO ◽

Fan-Jiang ZENG ◽

Bo LIU ◽

Cong SONG ◽

Shou-Lan PENG ◽

...

Keyword(s):

Alhagi Sparsifolia ◽

Water Integration ◽

Mother And Daughter

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The Effect of Water Shortage on Potted Peach Trees in Relation to Ecophysiological Parameters and Infra-red Thermometry

HortScience ◽

10.21273/hortsci.33.3.541b ◽

1998 ◽

Vol 33 (3) ◽

pp. 541b-541

Author(s):

Rita Giuliani ◽

James A. Flore

Keyword(s):

Chlorophyll Fluorescence ◽

Gas Exchange ◽

Early Detection ◽

Water Potential ◽

Canopy Temperature ◽

Water Shortage ◽

Development Rate ◽

Plant Water ◽

Infra Red ◽

Peach Trees

Potted peach trees grown outdoors during the 1997 season were subjected to drought and subsequent rewatering to evaluate their dynamic response to soil water content. The investigation was primarily focused on the early detection of plant water stress to prevent negative effects on the growth. Leaf chlorophyll fluorescence and canopy temperature estimates (by infra-red thermometry) were conducted. Drought effect on physiological processes were detected through by estimates of canopy development rate, leaf gas-exchange measurements; while leaf water potential was measured to characterize plant water status. A decrease in the canopy's development rate was found 1 week after irrigation was stopped, which also coincided with a more-negative leaf water potential, whereas a decrease of the gas-exchange activities occurred several days later. No significant differences between the stressed and control plants were recorded by the chlorophyll fluorescence parameters (Fo, Fm, Fv and the ratio Fv/Fm), whereas the infra-red estimates of canopy temperature detected a slight increase of the canopy surface temperature (connected to the change of leaf energy balance and in relation to partial stomatal closure) on the non-irrigated plants 1 week after the beginning of the trial. The use of infra-red thermometry for early detection of water shortage is discussed.

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