The variation of relative water content, SPAD chlorophyll meter reading, stomatal conductance, leaf area, and specific leaf area of Jerusalem artichoke genotypes under different durations of terminal drought in tropical region

2021 ◽  
Author(s):  
Aunchana Chaimala ◽  
Sanun Jogloy ◽  
Nimitr Vorasoot ◽  
Corley Holbrook ◽  
Craig K. Kvien ◽  
...  
Keyword(s):  
Stomatal Conductance ◽  
Water Content ◽  
Leaf Area ◽  
Specific Leaf Area ◽  
Relative Water Content ◽  
Jerusalem Artichoke ◽  
Tropical Region ◽  
Chlorophyll Meter ◽  
Terminal Drought ◽  
Relative Water

scholarly journals Growth and physiological response of two biomass sorghum (Sorghum bicolor (L.) Moench) genotypes bred for different environments, to contrasting levels of soil moisture

2015 ◽  
Vol 10 (4) ◽  
pp. 208 ◽  
Author(s):  
Lorenzo Barbanti ◽  
Ahmad Sher ◽  
Giuseppe Di Girolamo ◽  
Elio Cirillo ◽  
Muhammad Ansar
Keyword(s):  
Soil Moisture ◽  
Stomatal Conductance ◽  
Water Potential ◽  
Water Content ◽  
Aboveground Biomass ◽  
Relative Water Content ◽  
Physiological Response ◽  
Field Capacity ◽  
Biomass Sorghum ◽  
Relative Water

A better understanding of plant mechanisms in response to drought is a strong premise to achieving high yields while saving unnecessary water. This is especially true in the case of biomass crops for non-food uses (energy, fibre and forage), grown with limited water supply. In this frame, we investigated growth and physiological response of two genotypes of biomass sorghum (<em>Sorghum bicolor</em> (L.) Moench) to contrasting levels of soil moisture in a pot experiment carried out in a greenhouse. Two water regimes (high and low water, corresponding to 70% and 30% field capacity) were applied to JS-2002 and Trudan-8 sorghum genotypes, respectively bred for dry sub-tropical and mild temperate conditions. Two harvests were carried out at 73 and 105 days after seeding. Physiological traits (transpiration, photosynthesis and stomatal conductance) were assessed in four dates during growth. Leaf water potential, its components and relative water content were determined at the two harvests. Low watering curbed plant height and aboveground biomass to a similar extent (ca. 􀀀70%) in both genotypes. JS-2002 exhibited a higher proportion of belowground to aboveground biomass, <em>i.e</em>., a morphology better suited to withstand drought. Despite this, JS-2002 was more affected by low water in terms of physiology: during the growing season, the average ratio in transpiration, photosynthesis and stomatal conductance between droughty and well watered plants was, respectively, 0.82, 0.80 and 0.79 in JS-2002; 1.05, 1.08 and 1.03 in Trudan-8. Hence Trudan-8 evidenced a ca. 20% advantage in the three traits. In addition, Trudan-8 could better exploit abundant moisture (70% field capacity), increasing aboveground biomass and water use efficiency. In both genotypes, drought led to very low levels of leaf water potential and relative water content, still supporting photosynthesis. Hence, both morphological and physiological characteristics of sorghum were involved in plant adaptation to drought, in accordance with previous results. Conversely, the common assumption that genotypes best performing under wet conditions are less suited to face drought was contradicted by the results of the two genotypes in our experiment. This discloses a potential to be further exploited in programmes of biomass utilization for various end uses, although further evidence at greenhouse and field level is needed to corroborate this finding.

scholarly journals Salicylic acid and jasmonic acid alter physiological performance, assimilate mobilization and seed filling of soybean under salt stress

2018 ◽  
Vol 111 (3) ◽  
pp. 597 ◽  
Author(s):  
Kazem GHASSEMI-GOLEZANI ◽  
Salar FARHANGI-ABRIZ ◽  
Ali BANDEHAGH
Keyword(s):  
Salicylic Acid ◽  
Jasmonic Acid ◽  
Leaf Area ◽  
Specific Leaf Area ◽  
Relative Water Content ◽  
Seed Mass ◽  
Seed Filling ◽  
Leaf Mass ◽  
Content Index ◽  
Relative Water

<p>This research was conducted to investigate the morpho-physiological effects of salicylic acid and jasmonic acid on soybean performance and productivity under salinity. Leaf chlorophyll content index, carotenoids and anthocyanins content, photosystem II efficiency, relative water content, leaf area, leaf mass, specific leaf area, water use efficiency, seed filling duration, assimilate mobilization efficiency and seed mass decreased, but leaf temperature, specific leaf mass and electrolytic leakage of leaves increased with enhancing salinity. Salicylic acid improved leaf chlorophyll content index, anthocyanins content, leaf area, specific leaf area, water use efficiency, seed filing duration, assimilate mobilization efficiency and seed mass under both saline and non-saline conditions. The superior effects of salicylic acid on some traits such as maximum quantum yield of PSII, relative water content and leaf electrolytic leakage only occurred under different salinity levels. Jasmonic acid improved leaf mass, specific leaf mass, carotenoids content, relative water content, seed filling rate and reduced chlorophyll content index, leaf temperature, leaf area, specific leaf area, seed filling duration, assimilates mobilization efficiency and relative electrolytic leakage of soybean, with no significant effects on photosystem II efficiency and seed mass. Application of salicylic acid was, therefore, the superior treatment for enhancing physiological performance and seed mass of soybean plants under different salinity levels.</p>

Leaf growth and K+/Na+ ratio as an indication of the salt tolerance of three sorghum cultivars grown under salinity stress and IAA treatment

2004 ◽  
Vol 52 (3) ◽  
pp. 287-296 ◽  
Author(s):  
M. M. Azooz ◽  
M. A. Shaddad ◽  
A. A. Abdel-Latef
Keyword(s):  
Salt Tolerance ◽  
Water Content ◽  
Leaf Area ◽  
Salinity Stress ◽  
Relative Water Content ◽  
Leaf Growth ◽  
Dry Mass ◽  
Inhibitory Effect ◽  
Tolerance Index ◽  
Relative Water

The salt tolerance of three sorghum (Sorghum bicolor L.) cultivars (Dorado, Hagen Shandawil and Giza 113) and their responses to shoot spraying with 25 ppm IAA were studied. Salinity stress induced substantial differences between the three sorghum cultivars in the leaf area, dry mass, relative water content and tolerance index of the leaves. Dorado and Hagen Shandawil tolerated salinity up to 88 and 44 mM NaCl, respectively, but above this level, and at all salinity levels in Giza 113, a significant reduction in these parameters was recorded. The rate of reduction was lower in Dorado than in Hagen Shandawil and Giza 113, allowing the sequence Dorado ? Hagen Shandawil ? Giza 113 to be established for the tolerance of these cultivars to salinity. The differences in the tolerance of the sorghum cultivars were associated with large differences in K+ rather than in Na+, which was found to be similar in the whole plant. The youngest leaf was able to maintain a higher K+ content than the oldest leaf. Consequently the K+/Na+ ratios were higher in the most salt-tolerant cultivar Dorado than in the other sorghum cultivars, and in the youngest than in the oldest leaf. In conformity with this mechanism, the stimulatory effect of the exogenous application of IAA was mostly associated with a higher K+/Na+ ratio. Shoot spraying with IAA partially alleviated the inhibitory effect of salinity on leaf growth and on the K+ and Ca2+ contents, especially at low and moderate levels of salinity, while it markedly retarded the accumulation of Na+ in the different organs of sorghum cultivars. Abbreviations: LA: Leaf area, DM: Dry mass, I Indole acetic acid, RWC: Relative water content,TI: Tolerance index

scholarly journals Correlation and Path Coefficient Analysis in Bread Wheat (Triticum aestivum L.) Genotypes for Morpho-physiological Traits along with Grain Fe and Zn Content

2020 ◽  
pp. 130-140
Author(s):  
Mainak Barman ◽  
Vinay Kumar Choudhary ◽  
Satish Kumar Singh ◽  
Rabiya Parveen ◽  
Abhishek K. Gowda
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Water Content ◽  
Leaf Area ◽  
Relative Water Content ◽  
Flag Leaf ◽  
Triticum Aestivum L ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Relative Water

Character association studies help in assessing the relationship among yield and its components to enhance the selection utility. In view of this, the present research was carried out for assessing correlation and path coefficients among 30 bread wheat (Triticum aestivum L.) genotypes using fifteen quantitative parameters. Correlation analysis demonstrated a noteworthy positive relationship of days to fifty per cent flowering, number of tillers/plant, flag leaf area, spike length, plant height, chlorophyll content, relative water content, number of grains/ ear, thousand-grain weight, days to maturity and harvest index, with grain yield per plant at both the phenotypic and genotypic level except canopy temperature which showed a significant negative relationship. Path coefficient analysis revealed that plant height, flag leaf area, relative water content and grain per ear had the maximum positive direct effect on grain yield. Hence, the present investigation can be helpful in executing a reliable selection of parental lines based on these above mentioned traits in addition to developing high-yielding varieties for further breeding programme.

scholarly journals Effects of Foliar Spray on Morpho-Physiological Parameters under High Temperature Stress in Cotton (Gossypium hirsutum L.)

2021 ◽  
Vol 108 (june) ◽  
pp. 1-4
Author(s):  
Devi M ◽  
◽  
Vincent s ◽  
Babu Rajendra Prasad ◽  
Anandham R ◽  
...  
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Calcium Carbonate ◽  
Ambient Temperature ◽  
Water Content ◽  
Leaf Area ◽  
Relative Water Content ◽  
Foliar Spray ◽  
Canopy Temperature ◽  
Relative Water

High temperature is a critical barrier in most cotton growing areas, limiting cotton growth and development. The present study aimed to evaluate the effects of foliar spray on KC 3 cotton variety grown under ambient (32.66°C) and high temperature (37.21°C) stress in open-top chamber (OTC) with a temperature of 5°C from the ambient temperature for 10d from flowering to boll development stage. Foliar spray of kaolin @ 3% and calcium carbonate @ 5% were sprayed separately to the set of pots both in ambient and elevated temperature on 70th day of flowering. Observations on morphological and physiological parameters were recorded on viz., plant height (cm plant-1), leaf area (cm2 plant-1), relative water content (%), canopy temperature (°C), SPAD, chlorophyll fluorescence (Fv/Fm ratio). Kaolin @ 3% foliar spray significantly increased the plant height, leaf area, relative water content, chlorophyll content and reduced the canopy temperature both in high temperature and ambient temperature conditions. Among these treatments, T2 - kaolin 3% (Ambient) followed by T5 - Kaolin 3% (elevated temperature of 5 °C) recorded higher values as compared to calcium carbonate treatment both in ambient temperature and high temperature condition.

The Growth of Banana Plants in Relation to Temperature

1983 ◽  
Vol 10 (1) ◽  
pp. 43 ◽  
Author(s):  
DW Turner ◽  
E Lahav
Keyword(s):  
Water Content ◽  
Leaf Area ◽  
High Temperatures ◽  
Relative Water Content ◽  
Chilling Injury ◽  
Vapour Pressure Deficit ◽  
Dry Weight ◽  
Unit Leaf ◽  
Whole Plant ◽  
Relative Water

Bananas (cv. Williams) were grown for 12 weeks in sunlit growth chambers at day/night temperatures of 17/10, 21/14, 25/18, 29/22, 33/26 or 37/30°C. Humidity was not controlled. At 17/10°C, the plants showed chilling injury and heat injury occurred at 37/30°C. Total plant dry weight was greatest at 25/18°C while leaf area was greatest at 33/26°C. At high temperatures proportionately less dry matter was present in the roots and corm compared with plants at 25/18°C. High temperatures produced more horizontal leaves but, to compensate for this, the laminae folded more readily. Lamina folding was closely associated with relative water content of the laminae, except under cool conditions where laminae folded despite high (97-99%) leaf relative water contents. Unit leaf rate (increase in whole plant dry weight per unit leaf area per unit time) was greatest at 21/14°C (5.8 g m-2 day-1) and least at 37/30°C (1.7 g m-2 day-1.) and had a strong negative association with whole-plant leaf resistance. Leaf relative water content was more closely associated with vapour pressure deficit than temperature and even at 37/30°C was high at 94%.

scholarly journals Phenotyping of rice in salt stress environment using high-throughput infrared imaging

2014 ◽  
Vol 73 (1) ◽  
pp. 312-321 ◽  
Author(s):  
Zamin S. Siddiqui ◽  
Jung-Il Cho ◽  
Sung-Han Park ◽  
Taek-Ryoun Kwon ◽  
Gang-Seob Lee ◽  
...  
Keyword(s):  
Salt Stress ◽  
Stomatal Conductance ◽  
Water Content ◽  
Relative Water Content ◽  
Infrared Imaging ◽  
Oryza Sativa L ◽  
Photosynthetic Parameters ◽  
Relative Water ◽  
Stress Environment ◽  
And Performance

Abstract Phenotyping of rice (Oryza sativa L. cv. Donggin) in salt stress environment using infrared imaging was conducted. Results were correlated with the most frequently used physiological parameters such as stomatal conductance, relative water content and photosynthetic parameters. It was observed that stomatal conductance (R2 = -0.618) and relative water content (R2 = -0.852) were significantly negatively correlated with average plant temperature (thermal images), while dark-adapted quantum yield (Fv/Fm, R2 = -0.325) and performance index (R2 = -0.315) were not consistent with plant temperature. Advantages of infrared thermography and utilization of this technology for the selection of stress tolerance physiotypes are discussed in detail.

scholarly journals Leaf Area, Relative Water Content and Stay-green Habit of Iranian Landraces (Triticum aestivum L.) under Water Stress in Field Conditions

2020 ◽  
pp. 1-13
Author(s):  
Amandeep Kaur ◽  
Rashpal Singh Sarlach
Keyword(s):  
Water Stress ◽  
Water Content ◽  
Leaf Area ◽  
Relative Water Content ◽  
Grain Filling ◽  
Triticum Aestivum L ◽  
Stress Conditions ◽  
Stay Green ◽  
Vigor Index ◽  
Relative Water

Water stress is one of the major and challenging abiotic stress that affects the plant mostly at all stages like tillering, booting, anthesis, grain formation and grain filling. The aim of the present study is to investigate the effect of water stress on relative water content, leaf area and stay green habit of Iranian landraces along with commercial relevant checks under irrigated, restricted irrigation and rain-fed conditions. Iranian landraces were selected based on minimum reduction in vigor index as compared to control lines during preliminary screening experiment in the lab in which water stress is induced by Polyethylene glycol (PEG 6000). A field experiment was carried out at the experimental area of the Department of Plant Breeding & Genetics, Punjab Agricultural University, Ludhiana, Punjab during 2016-2017. The relative water content of Iranian landraces was calculated at the bolting stage according to the turgid weight by applying the equation of relative water content. Leaf area was recorded by leaf area meter and stay-green habit based on a 1-4 visual scale. Analysis of variance revealed interaction among treatment and genotypes was significant (P≤ 0.05) for the leaf area, relative water content, stay green habit at anthesis and 30 days after anthesis. Leaf area, relative water content and stay green habit of Iranian landraces along with commercial checks reduced under water stress conditions. Based on the performance of Iranian landraces under stress conditions, 5 lines IWA 8600397, IWA 8600567, 8606739, IWA 8606786 and IWA 8600753 were considered as water stress tolerant.

scholarly journals Physiological responses to drought of Cnidoscolus quercifolius Pohl in semi-arid conditions

2019 ◽  
Vol 6 (1) ◽  
pp. 493 ◽  
Author(s):  
Fabio Rodrigues Ramos ◽  
Antonio Lucineudo Oliveira Freire
Keyword(s):  
Soil Moisture ◽  
Stomatal Conductance ◽  
Moisture Content ◽  
Water Content ◽  
Water Use ◽  
Transpiration Rate ◽  
Relative Water Content ◽  
Soil Moisture Content ◽  
Relative Water ◽  
Use Efficiency

This study aimed to evaluate the physiological behavior of faveleira (Cnidoscolus quercifolius Pohl) plants grown in the field, in Caatinga, during wet and dry seasons. Adult plants were selected for evaluation in March and April (wet season) and May and June (dry season), during 2016. We evaluated the soil water content, water potential (Ψw), osmotic potential (Ψπ), relative water content (RWC), stomatal conductance (gs), transpiration rate (E), photosynthetic rate (A), intercellular CO2 concentration (Ci), instantaneous water use efficiency (A/E) and carboxylation efficiency (A/Ci). The reduction in water availability in the soil promoted a marked decrease in soil water potential, which was more affected than the relative water content. The opening of the stomata was affected by the decrease in soil moisture content, reducing the stomatal conductance, transpiration rate, photosynthesis rate, instantaneous water use efficiency and carboxylation efficiency. The photosynthesis was more affected than transpiration by the reduction in soil moisture content.

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