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Leaf water potential measurements using the pressure chamber: synthetic testing of assumptions towards best practices for precision and accuracy
leaf water potential plant water relations plant water status pressure bomb pressure chamber water stress
2023/11/28
Leaf water potential (ψ leaf), typically measured using the pressure chamber, is the most important metric of plant water status, providing high theoretical value and information content for multiple ...
Needle water potential of selected pine species during the off-season: A case study
water stress Pinus global radiation climatic changes stomatal closure transpiration
2017/4/6
In this study we investigated the needle water potential of different pine species using a pressure chamber during winter months. Totally, seven pine species Pinus jeffreyi Greville & Balfour, Pinus p...
Evaluation of Different Soil Water Potential by Field Capacity Threshold in Combination with a Triggered Irrigation Module
field water capacity dual-porosity model HYDRUS-1D
2015/7/30
Irrigation efficiency improvement requires optimization of its parameters like irrigation scheduling, threshold and
amount of water usage. If these parameters are not satisfactorily optimized, negat...
Effects of Water Stress on Leaf Water Potential, Flowering, Carbohydrate Content and ABA Content in ‘Meiwa’ Kumquat Trees
first-flush flower starch total sugar
2010/11/24
‘Meiwa’ kumquat (Fortunella crassifolia Swingle) trees were subjected to water stress in order to increase first-flush flowers by withholding water until the soil water content reached about 30% and w...
Dominant Factors in Reduction of Photosynthetic Rate Affected by Air Humidity and Leaf Water Potential in Rice Plants
Dry matter production Leaf production rate Photosynthetic rate Plant type Root yield Starch content Thai cassava
2009/8/6
In order to clarify the dominant factor responsible for the reduction in photosynthetic rate caused by 1) an increase in leaf-air vapor pressure difference and 2) a decrease in leaf water potential i...
Developmental Change in Panicle Water Potential in Rice
Leaf water potential Panicle water potential Rice
2009/8/4
Rice panicles start to transpire just after heading. We can therefore expect that the water potential of panicles changes little prior to heading and varies in response to transpiration after heading...
Effect of Water Potential of Culture Medium on Geotropic Response of Primary Seminal Root in Japanese Wheat Cultivars
Geotropic response Primary seminal root Triticum aestivum Water potential
2009/8/4
It has been observed that wheat has a shallow root system in wet soil and a deep root system in dry soil. However, the control mechanisms of root growth depending on soil water status remain unclear. ...
Decrease of Leaf Water Potential and Leaf Injury of Tea Plant (Thea sinensis L.) Subject to Cold Winter Wind in Sanin Region of Japan : II. Increase of water flow resistance inside the plant contributes to decrease of leaf water potential
Cold wind injury Leaf water potential Transpiration rate Water flow resistance Tea
2009/8/4
In the previous report, we indicated that cold wind injury of tea leaf in Sanin region occurred under decreases of leaf water potential (ΨL) caused by low temperature and strong wind. We attempted to ...
Decrease of Leaf Water Potential and Leaf Injury of Tea Plant (Thea sinensis L.) Subject to Cold Winter Wind in Sanin Region of Japan : I. Response of leaf water potential and leaf injury under field conditions
Cold wind injury Leaf water potential Low temperature Strong wind Tea
2009/8/4
Tea leaf sometimes receives serious damage as leaf blight or defoliation by winter cold wind in Sanin region of Japan. When wind of 4-7ms-1 blew, air temperature decreased to 0∼-4.4°C and a litt...
Changes of Water Potential in Rice Panicle under Increasing Drought Stress at Various Stages
Drought Panicle development Rice Water potential Water stress
2009/7/31
Experiments were conducted to examine whether the responses in panicle water potential under drought changes with panicle development. Twenty seedlings of two rice cultivars, Norin 20 and Milyang 23, ...
Response of Leaf Water Potential of Rice (Oryza sativa L.) to Evaporative Demand under Paddy Field Conditions:II. Relationship between response and yield
Evaporative demand Grain yield Leaf water potential Location Radiation Spikelet number
2009/7/31
We observed previously (Part 1) that maintenance ability of leaf water potential (Ψ1) in rice plants under paddy field conditions changed depending on planting years and seasons and individual locatio...
Response of Leaf Water Potential of Rice (Oryza sativa L.) to Evaporative Demand under Paddy Field Conditions : I. Changes with plant development
Evaporimeter Evaporative demand Growth stage Leaf water potential
2009/7/31
Because the leaf water potential (Ψ1) of the rice plant (Oryza sativa L.) is strongly affected by the evaporative demand of the atmosphere under paddy field conditions, and most changes in Ψ1 reflect ...
Mechanisms of Different Responses of Leaf Photosynthesis in African Rice (Oryza glaberrima Steud.) and Rice (Oryza sativa L.) to Low Leaf Water Potential
Abscisic acid Drought tolerance Oryza glaberrima Steud Oryza sativa L Photosynthesis
2009/7/31
This research was conducted to elucidate the mechanisms in water stress tolerance of Oryza glaberrima Steud. with special reference to stomatal conductance. Leaf photosynthesis (LPS) of O. glaberrima...
Effects of Panicle Water Potential on Water Stress Susceptibility in Rice
Development Panicle Rice Water potential Water stress susceptibility Winnowed paddy number
2009/7/30
The effects of drought on the rice yield differ depending on the time when plants are subjected to the drought. It is therefore probable that water stress susceptibility, the degree of yield reduction...
Influence of Leaf Xylem Water Potential and Leaf Position on Relationship between Nitrogen Content and Photosynthetic Rate of Rice Plant
Days after fully expanded Leaf position Leaf xylem water potential Nitrogen content
2009/7/29
Even though the nitrogen content (mgNdm-2) of rice leaves is the same, a large difference in the net photosynthetic rate (Pn) has been recognized. To determine the reasons for the difference, leaf xyl...