Geographic variation in extrafloral nectaries in the ant-associated plant genus Adriana (Euphorbiaceae) and its relationship to water availability

2007 ◽  
Vol 55 (5) ◽  
pp. 568 ◽  
Author(s):  
M. A. Whalen ◽  
D. A. Mackay
Keyword(s):  
Water Stress ◽  
Geographic Variation ◽  
Water Availability ◽  
Secretory Activity ◽  
Climatic Variation ◽  
Extrafloral Nectaries ◽  
Climatic Variables ◽  
Extrafloral Nectary ◽  
Effect Of Water ◽  
The Relationship

The relationship between geographic variation in extrafloral nectary size and climatic variation was assessed in three taxa within Adriana (Euphorbiaceae). In each taxon, there was a significant association between gland size and moisture-related climatic variables. A glasshouse experiment was conducted to examine the effect of water stress on nectary longevity, and it was found that the secretory activity of nectaries declined more rapidly on drought-stressed plants than on watered plants.

Study on Irrigation Model Based on Plant Ultrasonic Acoustic Emissions

2013 ◽  
Vol 330 ◽  
pp. 346-349
Author(s):  
Jian Xin Wang ◽  
Xian Wei Gao ◽  
Mei Li Sui ◽  
Xiu Ying Li
Keyword(s):  
Water Stress ◽  
Data Acquisition ◽  
Acoustic Emissions ◽  
Water Saving ◽  
Water Molecules ◽  
Effect Of Water ◽  
Irrigation Time ◽  
Conduit Wall ◽  
Cavitation Detection ◽  
The Relationship

Produced by cohesion between water molecules or adhesion to the conduit wall, the plant cavitation is accompanied by the vessel walls vibration which is the indicator of the water stress. The ultrasonic acoustic emissions (UAEs) are used to detect the plant cavitation events which are the transmission of vibration. The UAEs could be detected in ultrasonic frequencies between 100K Hz and 1 MHz. The PCI-2 data acquisition (DAQ) equipment and R15 sensors are used to improve the precision of cavitation detection. When the water stress and dehydration gets heavier, the UAEs rate gets higher. Use the tomato practice data with the empirical deduction under the modern greenhouse conditions, the UAEs and Transpiration Index (UAETI) and the UAEs Irrigation Index (UAEII) irrigation model are draw from the relationship between transpiration and UAEs. UAETI can be used to analysis the transpiration, and UAEII can be used to analysis the irrigation time. It is better to use UAEs technique to carry out automatic and precise irrigation for the plant and to improve the effect of Water-saving irrigation.

Effect of Water Stress on Photosynthesis, Respiration, and Transpiration of Four Abies Species

1973 ◽  
Vol 3 (2) ◽  
pp. 293-298 ◽  
Author(s):  
George S. Puritch
Keyword(s):  
Water Stress ◽  
Maximum Rate ◽  
Net Photosynthesis ◽  
Gradual Reduction ◽  
Linear Rate ◽  
Optimum Rate ◽  
Effect Of Water ◽  
Steady Rate ◽  
Rate Of Decline ◽  
The Relationship

The relationship between water stress and rates of net photosynthesis, respiration, and transpiration was determined for four Abies species native to Canada. Net photosynthesis, after an initial optimum rate, declined in three phases as water stress increased, viz. a rapid linear rate of decline, a second more gradual reduction and, finally, a steady rate of zero net photosynthesis. Of the four species, photosynthesis of A. grandis was affected the least by water stress, whereas that of A. balsamea was affected the most. Respiration declined at about the same water stress as photosynthesis, but was only reduced to between 40–75% of the maximum rate, depending on the species. Transpiration declined at similar water stresses to those of photosynthesis and after an initial decline, continued at between 10–30% of the maximum rate at water stresses up to 35 bars.

The Effect of Water Supply on the Growth of lzmir, Palotina and Amarelinho Tobaccos

1981 ◽  
Vol 11 (2) ◽  
Author(s):  
R. Comber
Keyword(s):  
Water Stress ◽  
Water Supply ◽  
Sand Culture ◽  
Effect Of Water

AbstractThe Oriental tobacco variety Izmir has been grown in sand culture in a greenhouse under various degrees of water stress. Plants given 400 cm

The Effect of Water Stress on Wheat Kernel Size, Color and Protein Composition

2007 ◽  
Vol 22 (2) ◽  
pp. 157-171 ◽  
Author(s):  
Iwona Konopka ◽  
Małgorzata Tańska ◽  
Agnieszka Pszczółkowska ◽  
Gabriel Fordoński ◽  
Witold Kozirok ◽  
...  
Keyword(s):  
Water Stress ◽  
Protein Composition ◽  
Kernel Size ◽  
Effect Of Water ◽  
Wheat Kernel

Effect of water stress on Citrus photosynthesis characteristic

2011 ◽  
Vol 36 (6) ◽  
pp. 653-657
Author(s):  
Shen-xi XIE ◽  
Qiang LIU ◽  
Xing-yao XIONG ◽  
Qiu-ming ZHANG ◽  
C J. Lovatt
Keyword(s):  
Water Stress ◽  
Effect Of Water

scholarly journals Provenance Trials of the Mexican Spruces in Nursery Conditions: Three Species Endangered by Climatic Variation

2020 ◽  
Vol 3 (1) ◽  
pp. 12
Author(s):  
José Marcos Torres-Valverde ◽  
José Ciro Hernández-Díaz ◽  
Artemio Carrillo-Parra ◽  
Eduardo Mendoza-Maya ◽  
Christian Wehenkel
Keyword(s):  
Cluster Analysis ◽  
Genetic Differentiation ◽  
Local Adaptation ◽  
Quantitative Traits ◽  
Climatic Factors ◽  
Climatic Variation ◽  
Climatic Variables ◽  
Provenance Trials ◽  
Survival And Growth ◽  
Picea Species

The three Mexican spruces’ distributions are fragmented, which could lead to phenological, morphological and genetic differentiation, partially caused by local adaptation. In this study, we examined the effect that climatic variables had on the survival and growth of 5641 Picea seedlings, coming from eight seed provenances of three species and produced in identical nursery conditions. The respective responses of each species and provenance can be considered as a proxy of the genetic differentiation and adaptation of each population. A cluster analysis revealed: (i) significant differences in genetic quantitative traits among the three Picea species and (ii) significant correlations between genetic quantitative traits and climatic factors.

Effect of water stress on some enzymes of nitrogen metabolism in pigeonpea

1981 ◽  
Vol 20 (12) ◽  
pp. 2675-2677 ◽  
Author(s):  
I.S. Sheoran ◽  
Y.P. Luthra ◽  
M.S. Kuhad ◽  
Randhir Singh
Keyword(s):  
Water Stress ◽  
Nitrogen Metabolism ◽  
Effect Of Water
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