Temperature effects in the measurement of water saturation deficit (relative water content) in Tobacco and Kale

Drought is a prominent limiting factor that impacts negatively durum wheat grain yield. Ten durum wheat breeding lines were evaluated under rainfall conditions at the Field Crop Institute Agricultural Experimental Station of Setif, Algeria, during the 2016/2017 cropping season. The investigation aimed to study the ability of flag leaf water status to discriminate among varieties for drought tolerance trait. Significant variability was observed among the tested varieties for leaf dry, wilted and turgid weights, leaf relative water content, water saturation deficit and excised water loss, after three wilting periods of 30, 60 and 90 minutes dehydration at 40°C. The assessed breeding lines were differentially categorized as drought tolerant and drought sensitive based on either relative water content or water saturation deficit or excised leaf water loss genotypic mean values. Correlation, principal components and cluster analyses indicated an unwanted significant association between excised leaf water loss and relative water content and water saturation deficit and classified the assessed entries into three clusters (CI, C2 and C3). Cluster C1 had high relative water content, low water saturation deficit but high excised water loss, while C3 had low relative water content, low excised leaf water but high-water saturation deficit, C2 being intermediate. Crosses between distant clusters (C1 vs C3) are proposed to generate more variability of the targeted traits in progeny population and to break undesirable linkage between alleles controlling leaf water status, allowing to select efficiently drought tolerant genotypes.

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Effects of Sodium Chloride Salinity on Water Relations and Ion Accumulation in Two Mungbean Varieties Differing in Salinity Tolerance

Journal of the Asiatic Society of Bangladesh Science ◽

10.3329/jasbs.v45i1.46569 ◽

2019 ◽

Vol 45 (1) ◽

pp. 45-54

Author(s):

Mst Shahnaz Sultana ◽

MA Halim ◽

Feroza Hossain ◽

M Abdul Karim ◽

Mohammad Talim Hossain

Keyword(s):

Salt Tolerance ◽

Water Content ◽

Relative Water Content ◽

Water Saturation ◽

Water Status ◽

Water Saturation Deficit ◽

Saturation Deficit ◽

Plant Parts ◽

Relative Water ◽

Exudation Rate

Salt tolerance in relation to water status and plant nutrients of two mungbean varieties, BARImung 2 (salinity sensitive) and BUmung 2 (salinity tolerant) was evaluated. The seeds were grown in pots and treated with NaCl levels of 0 (control), 100 and 200 mM. Different parameters related to water relations as well as mineral nutritients were measured. The exudation rate and relative water content were decreased but water saturation deficit was increased by salinity in both the varieties. In BARImung 2 plants, the exudation rate and relative water content were lower but water saturation deficit was higher than those in BUmung 2 at both 100 and 200 mM NaCl levels. Salinity also influenced the accumulation of Na, K, Ca and Mg in leaves, stems and roots of the two said mungbean varieties. Sodium accumulation was inceseased in all the plant-parts of both the varieties in the order of stem > root > leaf but in BUmung 2 the accumulation was lower than that of BARImung 2 except in root. Potassium accumulation deceresed in all parts of both the mungbean varieties but that was lower in BUmung 2 than that of BARImung 2. The contents of Ca and Mg in all the plant-parts increased more in BUmung 2 than those of BARImung 2 with the increase of salinity levels. All these results indicated that high salt tolerance in BUmung 2 was associated with its better water status, more or less uniform mineral nutrient (Ca and Mg) distribution in different plantparts than that in BARImung 2. Asiat. Soc. Bangladesh, Sci. 45(1): 45-54, June 2019

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Temperature effects in determinations of leaf relative water content

Grass and Forage Science ◽

10.1111/j.1365-2494.1977.tb01438.x ◽

1977 ◽

Vol 32 (4) ◽

pp. 225-226 ◽

Cited By ~ 3

Author(s):

W. SHEPHERD

Keyword(s):

Water Content ◽

Relative Water Content ◽

Temperature Effects ◽

Relative Water ◽

Leaf Relative Water Content

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The Method of Plant Water Status Measurement in Sweet Potato (Ipomoea Batatas (L) Lam.)

Beccariana Botanical Research Bulletin ◽

10.30862/bbrp.v7i1.274 ◽

2010 ◽

Vol 7 (1) ◽

Author(s):

Saraswati Prabawardani

Keyword(s):

Water Content ◽

Sweet Potato ◽

Relative Water Content ◽

Water Status ◽

Plant Water Status ◽

Equilibration Time ◽

Plant Water ◽

Font Size ◽

Potato Leaf ◽

Relative Water

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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Palmer Amaranth (Amaranthus palmeri) Competition for Water in Cotton

Weed Science ◽

10.1614/ws-d-15-00062.1 ◽

2015 ◽

Vol 63 (4) ◽

pp. 928-935 ◽

Cited By ~ 11

Author(s):

Sarah T. Berger ◽

Jason A. Ferrell ◽

Diane L. Rowland ◽

Theodore M. Webster

Keyword(s):

Water Content ◽

Relative Water Content ◽

Yield Loss ◽

Linear Trend ◽

Palmer Amaranth ◽

Cotton Production ◽

Excess Water ◽

Relative Water ◽

Competition For Light ◽

Daily Water

Palmer amaranth is a troublesome weed in cotton production. Yield losses of 65% have been reported from season-long Palmer amaranth competition with cotton. To determine whether water is a factor in this system, experiments were conduced in 2011, 2012, and 2013 in Citra, FL, and in Tifton, GA. In 2011, infrequent rainfall lead to drought stress. The presence of Palmer amaranth resulted in decreased soil relative water content up to 1 m in depth. Cotton stomatal conductance (gs) was reduced up to 1.8 m from a Palmer amaranth plant. In 2012 and 2013 higher than average rainfall resulted in excess water throughout the growing season. In this situation, no differences were found in soil relative water content or cottongsas a function of proximity to Palmer amaranth. A positive linear trend was found in cotton photosynthesis and yield; each parameter increased as distance from Palmer amaranth increased. Even in these well-watered conditions, daily water use of Palmer amaranth was considerably higher than that of cotton, at 1.2 and 0.49 g H20 cm−2d−1, respectively. Although Palmer amaranth removed more water from the soil profile, rainfall was adequate to replenish the profile in 2 of the 3 yr of this study. However, yield loss due to Palmer amaranth was still observed despite no change ings, indicating other factors, such as competition for light or response to neighboring plants during development, are driving yield loss.

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Effect of saline water on relative water content, rate of photosynthesis, chlorophyll content and yield of indian mustard (Brassica junceal.)

International Journal of Bio-resource and Stress Management ◽

10.5958/j.0976-4038.5.1.006 ◽

2014 ◽

Vol 5 (1) ◽

pp. 37

Author(s):

Kripa Shanker ◽

S. K. S. Parihar ◽

S. K. Biswas ◽

Kuldeep

Keyword(s):

Water Content ◽

Chlorophyll Content ◽

Relative Water Content ◽

Saline Water ◽

Indian Mustard ◽

Relative Water ◽

Rate Of Photosynthesis

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Relative water content consistently predicts drought mortality risk in seedling populations with different morphology, physiology, and times to death

Plant Cell & Environment ◽

10.1111/pce.14149 ◽

2021 ◽

Author(s):

Gerard Sapes ◽

Anna Sala

Keyword(s):

Water Content ◽

Mortality Risk ◽

Relative Water Content ◽

Relative Water

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Influence of humates to mitigate NaCl-induced adverse effects on Ocimum basilicum L.: relative water content and photosynthetic pigments

Pakistan Journal of Botany ◽

10.30848/pjb2021-4(6) ◽

2021 ◽

Vol 53 (4) ◽

Author(s):

Juan José Reyes-Pérez ◽

Bernardo Murillo-Amador ◽

Alejandra Nieto-Garibay ◽

Luis G. Hernández-Montiel ◽

Francisco H. Ruiz-Espinoza ◽

...

Keyword(s):

Adverse Effects ◽

Water Content ◽

Photosynthetic Pigments ◽

Relative Water Content ◽

Ocimum Basilicum ◽

Relative Water

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Relationship between Relative Water Content, Nitrogen Pools, and Growth of Phaseolus vulgaris L. and P. acutifolius A. Gray during Water Deficit

Crop Science ◽

10.2135/cropsci1999.0011183x0039000200028x ◽

1999 ◽

Vol 39 (2) ◽

pp. 467-475 ◽

Cited By ~ 47

Author(s):

Ignacio Lazcano‐Ferrat ◽

Carol J. Lovatt

Keyword(s):

Phaseolus Vulgaris ◽

Water Content ◽

Water Deficit ◽

Relative Water Content ◽

Phaseolus Vulgaris L ◽

Nitrogen Pools ◽

Relative Water

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Assessment of lettuce quality during storage at low relative humidity using Global Stability Index methodology

Food Science and Technology ◽

10.1590/s0101-20612012005000043 ◽

2012 ◽

Vol 32 (2) ◽

pp. 366-373 ◽

Cited By ~ 5

Author(s):

María Roberta Ansorena ◽

María Victoria Agüero ◽

María Grabriela Goñi ◽

Sara Roura ◽

Alejandra Ponce ◽

...

Keyword(s):

Ascorbic Acid ◽

Relative Humidity ◽

Global Stability ◽

Water Content ◽

Relative Water Content ◽

Storage Time ◽

Stability Index ◽

Total Chlorophyll ◽

External Zone ◽

Relative Water

During postharvest, lettuce is usually exposed to adverse conditions (e.g. low relative humidity) that reduce the vegetable quality. In order to evaluate its shelf life, a great number of quality attributes must be analyzed, which requires careful experimental design, and it is time consuming. In this study, the modified Global Stability Index method was applied to estimate the quality of butter lettuce at low relative humidity during storage discriminating three lettuce zones (internal, middle, and external). The results indicated that the most relevant attributes were: the external zone - relative water content, water content , ascorbic acid, and total mesophilic counts; middle zone - relative water content, water content, total chlorophyll, and ascorbic acid; internal zone - relative water content, bound water, water content, and total mesophilic counts. A mathematical model that takes into account the Global Stability Index and overall visual quality for each lettuce zone was proposed. Moreover, the Weibull distribution was applied to estimate the maximum vegetable storage time which was 5, 4, and 3 days for the internal, middle, and external zone, respectively. When analyzing the effect of storage time for each lettuce zone, all the indices evaluated in the external zone of lettuce presented significant differences (p < 0.05). For both, internal and middle zones, the attributes presented significant differences (p < 0.05), except for water content and total chlorophyll.

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