scholarly journals Comparison of Pressure Chamber and Thermocouple Psychrometer Determinations of Leaf Water Status in Tomato

1971 ◽  
Vol 48 (1) ◽  
pp. 106-107 ◽  
Author(s):  
J. M. Duniway
Keyword(s):  
Water Status ◽  
Pressure Chamber ◽  
Leaf Water ◽  
Leaf Water Status ◽  
Thermocouple Psychrometer

scholarly journals Measuring Leaf-water Potential in Chickpea with a Pressure Chamber

1979 ◽  
Vol 15 (4) ◽  
pp. 377-383 ◽  
Author(s):  
M. V. K. Sivakumar ◽  
S. M. Virmani
Keyword(s):  
Water Potential ◽  
Soil Water ◽  
Leaf Water Potential ◽  
Water Status ◽  
Pressure Chamber ◽  
Leaf Water ◽  
Leaf Water Status ◽  
Irrigated Crops ◽  
Different Depths ◽  
First Time

SUMMARYThe pressure-chamber technique has been used for the first time to measure leaf-water potentials in chickpea under field conditions. Available soil-water contents at different depths for irrigated and non-irrigated crops are presented along with the diurnal variation in leaf-water status, to show that pressure-chamber measurements correspond closely with available soil water. Leaf-water potential has also shown differences in leaf-water status among different cultivars. The rapidity and ease with which measurements can be made in the field make the technique suitable for quick measurements of leaf-water status for chickpea.

Drought Effects on Transpiration and Leaf Water Status of Cowpea in Controlled Environments

1980 ◽  
Vol 7 (2) ◽  
pp. 141 ◽  
Author(s):  
AE Hall ◽  
E Schulze
Keyword(s):  
Leaf Area ◽  
Water Status ◽  
Vapour Pressure Deficit ◽  
Pressure Chamber ◽  
Leaf Water ◽  
Drought Treatment ◽  
Leaf Water Status ◽  
Unit Leaf ◽  
Drought Avoidance ◽  
Controlled Environments

The factors responsible for the extreme drought avoidance of cowpeas [Vigna unguiculata (L.) Walp.] previously observed in several field environments were investigated. Drought avoidance is defined as the extent to which high plant water potentials are maintained in the presence of environmental drought. Cowpeas were grown in controlled environments and subjected to either frequent irrigation or progressive drought. Plants in the drought treatment were grown for up to 2 months on 2-2.5 litres per plant of available water supplied 5 days after emergence. Transpiration of whole plants was determined by pot weighing, and leaf water status was determined with a pressure chamber. Well watered cowpeas avoided drought by two mechanisms: by avoiding water loss, because at constant air temperature transpiration increased only slightly with increases in vapour pressure deficit from 20 to 40 mbar; and due to an efficient water transport system which resulted in only small decreases in pressure chamber values with increases in transpiration at high rates of transpiration. Non-irrigated cowpeas avoided drought by maintaining low transpiration rates due to reduced leaf area and reduced transpiration per unit leaf area compared with irrigated plants.

Employment of artificial neural networks for non-invasive estimation of leaf water status using color features: a case study in Spathiphyllum wallisii

2021 ◽  
Vol 43 (5) ◽  
Author(s):  
Amin Taheri-Garavand ◽  
Abdolhossein Rezaei Nejad ◽  
Dimitrios Fanourakis ◽  
Soodabeh Fatahi ◽  
Masoumeh Ahmadi Majd
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Water Status ◽  
Leaf Water ◽  
Leaf Water Status ◽  
Non Invasive ◽  
Color Features ◽  
Artificial Neural

Visual estimation of plant water status in cereals

1979 ◽  
Vol 92 (1) ◽  
pp. 83-89 ◽  
Author(s):  
H. G. Jones
Keyword(s):  
Spring Wheat ◽  
Water Status ◽  
Plant Morphology ◽  
Leaf Water ◽  
Plant Water Status ◽  
Plant Water ◽  
Visual Estimation ◽  
Leaf Water Status ◽  
Visual Scoring ◽  
Breeding Programmes

SummaryThe potential offered for plant breeding programmes by visual scoring techniques for plant water status was investigated in rice and spring wheat. It was found that differing plant morphology could seriously bias visual estimates of leaf water potential, particularly in spring wheat. In spite of this problem, it was found that at least for rice, this type of approach may have potential in future breeding programmes where an estimate of leaf water status is required, such as those for drought tolerance, so long as a high intensity of selection is not necessary.

scholarly journals Diurnal Regulation of Leaf Water Status in High- and Low-Mannitol Olive Cultivars

Plants ◽  
2014 ◽  
Vol 3 (2) ◽  
pp. 196-208 ◽  
Author(s):  
Riccardo Bianco ◽  
Giuseppe Avellone
Keyword(s):  
Water Status ◽  
Leaf Water ◽  
Leaf Water Status ◽  
Olive Cultivars ◽  
Diurnal Regulation

Effect of rain shelters and drought on leaf water status and photosynthetic parameters in tomato

2015 ◽  
Vol 61 (9) ◽  
pp. 1273-1288 ◽  
Author(s):  
Guangcheng Shao ◽  
Min Yuan ◽  
Na Liu ◽  
Jianzhong Ji ◽  
Wenzheng Yu
Keyword(s):  
Water Status ◽  
Leaf Water ◽  
Photosynthetic Parameters ◽  
Leaf Water Status
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