scholarly journals Investigation on the effects of water loss on the solar spectrum reflectance and transmittance of Osmanthus fragrans leaves based on optical experiment and PROSPECT model

RSC Advances ◽  
2021 ◽  
Vol 11 (59) ◽  
pp. 37268-37275
Author(s):  
Ying Gao ◽  
Bo Tang ◽  
Beibei Lu ◽  
Guojian Ji ◽  
Hong Ye
Keyword(s):  
Refractive Index ◽  
Water Content ◽  
Internal Structure ◽  
Water Loss ◽  
Solar Spectrum ◽  
Pigment Content ◽  
Brown Pigment ◽  
Osmanthus Fragrans ◽  
Structure Index ◽  
Leaf Water Loss

In addition to reducing water content, leaf water loss also exerted three effects on the leaf reflectance and leaf transmittance, i.e., the increases of brown pigment content, leaf refractive index, and leaf internal structure index.

Relationship of excised-leaf water loss and stomatal frequency in wheat

1993 ◽  
Vol 73 (1) ◽  
pp. 93-99 ◽  
Author(s):  
H. Wang ◽  
J. M. Clarke
Keyword(s):  
Triticum Aestivum ◽  
Water Content ◽  
Water Loss ◽  
Triticum Aestivum L ◽  
Leaf Water ◽  
Genotypic Differences ◽  
Stomatal Frequency ◽  
Stomatal Characteristics ◽  
Growth Room ◽  
Leaf Water Loss

Rate of water loss from excised leaves of wheat (Triticum spp.) is associated with adaptation to dry growing conditions, but the causes of observed genotypic differences are not well understood. This study was conducted to determine the relationship between stomatal characteristics and excised-leaf water status in tetraploid (Triticum turgidum L. var. durum) and hexaploid (Triticum aestivum L.) wheat genotypes. Samples were taken from field and growth-room experiments to measure stomatal frequency (SF) and size, leaf water content at excision (WC0) and 30 min after excision (WC30), rate of water loss (RWL) 30-120 min after excision, epidermal conductance (ge), and relative water content (RWC). SF was not correlated with RWL in the field experiments and was negatively correlated with WC0 and WC30 in tetraploids but not in hexaploids. In the growth-room experiment, SF was positively correlated with ge 50 and 30 min after excision for tetraploid and hexaploid genotypes, respectively. SF was correlated with RWL in tetraploids (r = 0.64*, n = 12) and hexaploids (r = 0.81**, n = 12). However, there were no significant correlations between stomatal characteristics and WC0, WC30 or RWC. These results indicate that SF is perhaps one of several factors influencing genotypic differences in excised-leaf water loss. The inconsistency of this relationship may be due to the influence of other traits affecting RWL. Key words: Leaf water loss, stomata, drought, Triticum aestivum L., T. turgidum L. var. durum

scholarly journals Response of wheat varieties to salinity: growth, yield and ion analysis

2021 ◽  
Vol 8 (2) ◽  
pp. 301-311
Author(s):  
Hina Nazir ◽  
Humaira Gul ◽  
Mamoona Rauf ◽  
Tabassum Yaseen ◽  
Khushnood Ur Rahman ◽  
...  
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Water Loss ◽  
Electrolyte Leakage ◽  
Relative Water Content ◽  
Leaf Water ◽  
Saline Control ◽  
Wheat Varieties ◽  
Relative Water ◽  
Leaf Water Loss

In plants, development, growth and yield most severely affected through saline soil/water in growth medium, ultimately cause severe threat to global food production for human being. Wheat (Triticum aestivum) is the most edible crop in Pakistan. Production of this crop can be improved through using marginal areas with the help of growing salt-tolerant varieties. The present investigation is carried out to screen out six local wheat varieties (F.Sarhad, Insaf, Lalma, Tatora, Bathoor and Barsat) with reference to their vegetative and reproductive growth, different physiological parameters [relative water content (RWC), electrolyte-leakage (EL) and leaf water loss (LWL)] and ionic status of plants. Present experiment designed in completely randomized manner (CRD) and 54 pots were arranged in the Botanical Garden, Department of Botany. These pots arranged in 6 lines with 9 pots/line and each line was irrigated with non-saline (control), 50 mM and 150 mM NaCl solution. The data from present research revealed that application of salt cause significant reduction in plant-height, root-length, fresh-biomass, dry-biomass, seed number/plant, seed weight/plant, spike-weight, relative water content, leaf water loss, and different ions of plants. Similarly at same applied doses of salt weight of 100 seeds, spike-length, electrolyte-leakage, Na+ and Cl- ions become increased. It has been concluded from the results of present study that varieties F. Sarhad, Insaf and Lalma exhibited more salt tolerance as compare to other varieties. So, these recommended for growing on moderately salt affected soil/water to achieve more yield of wheat from such affected lands of Khyber Pakhtunkhwa, Pakistan.

scholarly journals Effect of thickness on the optical properties of Gaas thin films

2013 ◽  
Vol 37 (1) ◽  
pp. 83-91 ◽  
Author(s):  
Chitra Das ◽  
Jahanara Begum ◽  
Tahmina Begum ◽  
Shamima Choudhury
Keyword(s):  
Thin Films ◽  
Dielectric Constant ◽  
Refractive Index ◽  
Band Gap ◽  
Optical Band Gap ◽  
Visible Region ◽  
Solar Spectrum ◽  
Band Gap Energy ◽  
Optical Parameters ◽  
Gap Energy

Effect of thickness on the optical and electrical properties of gallium arsenide (GaAs) thin films were studied. The films of different thicknesses were prepared by vacuum evaporation method (~10-4 Pa) on glass substrates at a substrate temperature of 323 K. The film thickness was measured in situ by a frequency shift of quartz crystal. The thicknesses were 250, 300 and 500 nm. Absorption spectrum of this thin film had been recorded using UV-VIS-NIR spectrophotometer in the photon wavelength range of 300 - 2500 nm. The values of some important optical parameters of the studied films (absorption coefficient, optical band gap energy and refractive index; extinction co-efficient and real and imaginary parts of dielectric constant) were determined using these spectra. Transmittance peak was observed in the visible region of the solar spectrum. Here transmittance showed better result when thicknesses were being increased. The optical band gap energy was decreased by the increase of thickness. The refractive index increased by increasing thickness while extinction co-efficient and real and imaginary part of dielectric constant decreased. DOI: http://dx.doi.org/10.3329/jbas.v37i1.15684 Journal of Bangladesh Academy of Sciences, Vol. 37, No. 1, 83-91, 2013

scholarly journals Pewarisan Sifat Densitas Stomata dan Laju Kehilangan Air Daun (rate leaf water loss RWL) pada Kacang Tanah (Arachis hypogaea L.)

2012 ◽  
Vol 14 (1) ◽  
pp. 73
Author(s):  
Adisyahputra Adisyahputra ◽  
Sudarsono Sudarsono ◽  
Kukuh Setiawan
Keyword(s):  
Water Loss ◽  
Gene Action ◽  
Stomatal Density ◽  
Female Parent ◽  
Quantitative Character ◽  
Arachis Hypogaea L ◽  
Relative Water ◽  
Qualitative Characters ◽  
Leaf Water Loss ◽  
High Level

The aim of this research is to analyze and examine the inheritance of stomatal density trait and RWL as a variable in drought tolerance ofpeanut. The experiment was conducted by using cv. Kelinci that is sensitive genotype as female parent and US 605 which is tolerantgenotype as male parent, including population off spring from hybrid cv. Kelinci (P1) with US 605 (P2). Stomatal density was determinedby making leaf imprint and by observing leaf imprint under microscope. Relative water loss was determined by dipping peanut leaf in PEG40% for 48 hours. Result of the analysis showed that stomatal density and RWL were not only controlled by qualitative characters of majorgene, but also controlled by quantitative character of minor gene by polygenic with the complex gene action. Both characters seem toinfluence more as genetic factor and have high level fixation additive varians which can give the opportunity to obtain the tolerant offspring.

scholarly journals Average refractive index of tendon as a function of water content

2018 ◽  
Vol 4 (1) ◽  
pp. 010302 ◽  
Author(s):  
Marina Shvachkina ◽  
Dmitry Yakovlev ◽  
Alexander Pravdin ◽  
Dmitry Yakovlev
Keyword(s):  
Refractive Index ◽  
Water Content ◽  
Average Refractive Index

Abstract 23: Body Fluid And Sodium Loss Leads To Aldosterone Hypersecretion And Muscle Catabolism In Hepatocellular Carcinoma Rats.

Hypertension ◽  
2021 ◽  
Vol 78 (Suppl_1) ◽  
Author(s):  
Satoshi Kidoguchi ◽  
Kento Kitada ◽  
Daisuke Nakano ◽  
Takashi Yokoo ◽  
Akira Nishiyama
Keyword(s):  
Blood Pressure ◽  
Water Content ◽  
Water Loss ◽  
Muscle Wasting ◽  
Salt Water ◽  
Hepatocellular Cancer ◽  
Dry Weight ◽  
Sodium Potassium ◽  
Body Sodium ◽  
Muscle Catabolism

Background: The number of cancer survivors coincides with cardiovascular diseases is increasing, therefore, we are promoting the concept of “Onco-Hypertension” to clarify the mechanism linking cancer and blood pressure. In this study, we evaluated body osmolyte and water imbalance in hepatocellular cancer (HCC) model rats. Methods: Wistar rats were administered diethylnitrosamine (DEN) (1.5 μg/day, p.o.), a carcinogenic drug, for 8 weeks to establish liver cancer. Three weeks after the completion of DEN administration, we investigated blood pressure, tissue osmolyte and water content, and its association with aldosterone secretion. Results: HCC rats significantly reduced blood pressure, skin sodium, potassium, and water content. In the carcass (muscle + bone), dry weight, sodium, potassium, and water content were dramatically reduced without changing bone mass in HCC rats, suggesting that HCC causes muscle wasting to supply osmolyte and water for the dehydrated organs. These osmolytes and water loss were significantly associated with increased urinary aldosterone excretion. Supplementation of 0.25% salt water to drink improved body sodium and water loss and muscle wasting in HCC rats, which were completely suppressed by treatment with spironolactone (75 mg/kg/day, p.o.), a mineralocorticoid receptor (MR) blocker. Conclusion: These findings suggest that HCC causes body osmolyte and water loss, which leads to aldosterone hypersecretion and muscle catabolism to compensate for dehydration. A relatively small amount of salt supplement ameliorates the HCC-induced dehydration and muscle wasting via aldosterone/MR-mediated sodium and water restoration.

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