نتایج جستجو برای: chlorophyll fluorescence parameters such as f0

تعداد نتایج: 6281860  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده مهندسی عمران 1388

چکیده روش های متعددی برای برآورد رواناب حاصل از بارش در حوضه های آبریز وجود دارد. یکی از این روش ها استفاده از مدل های هیدرولوژیکی است. با استفاده از مدل های هیدرولوژیکی و شبیه سازی فرآیندهای هیدرولوژیکی می توان با صرف کمترین زمان و هزینه، رواناب و مولفه های دیگر چرخ? هیدرولوژیکی را برآورد کرد. از آنجا که در حوضه های آبریز اندازه گیری تمام کمیت های مورد نیاز برای تحلیل رواناب ممکن نیست، انتخاب...

Journal: :Zeitschrift fur Naturforschung. Section C, Biosciences 1977
G F Searle

Photoreduction of the artificial electron acceptor, cytochrome c, by isolated spinach chloroplasts in the absence of added catalyst has been found to be resistant to inhibition by 10 mM salicyl­ aldoxime. This contrasts with the pronounced inhibition of the photoreduction of both 2,6-dichlorophenolindophenol and ferricyanide over a range of electron flow rates, and indicates an inhibition on th...

Journal: :علوم باغبانی 0
نگار سیم کش زاده مصطفی مبلی نعمت اله اعتمادی بهرام بانی نسب

abstract planting of olive (olea europaea l.) tree due to salt and drought tolerance and ever green habit increasingly is considered in urban landscape in recent years. the low resistance to cold has been a major problem in using this tree in temperate and cold zones. so, determination of frost resistance cultivars is one of the important measures for use of this tree in urban landscape. to eva...

Journal: :Agriculture 2023

The use of appropriate plant spacing in the canopy is an important and cost-free agrotechnical factor for increasing seed yield. Proper row sowing density are maintaining adequate light, ensuring good physiological processes, influencing nutritional status plants. As a consequence, this leads to better productivity while economic profitability. A four-year field experiment with white lupine was...

Journal: :Photosynthetica 2022

We recently developed a chlorophyll fluorescence method (activated F0 rise) for estimating if light wavelength preferably excites PSI or PSII in plants. Here, the was tested green microalgae: Scenedesmus quadricauda, ecornis, fuscus, Chlamydomonas reinhardtii, Chlorella sorokiniana, and Ettlia oleoabundans. The species displayed plant-like action spectra of rise, suggesting that PSII/PSI absorp...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند 1389

there has been a gradual shift of focus from the study of rule systems, which have increasingly been regarded as impoverished, … to the study of systems of principles, which appear to occupy a much more central position in determining the character and variety of possible human languages. there is a set of absolute universals, notions and principles existing in ug which do not vary from one ...

2017
Xiaohuan Mu Qinwu Chen Fanjun Chen Lixing Yuan Guohua Mi

Nitrogen is a major limiting factor for crop productivity. The relationship between photosynthesis and nitrogen nutrition has been widely studied. However, the molecular response of leaf photosynthesis to low nitrogen supply in crops is less clear. In this study, RNA sequencing technology (RNA-Seq) was used to investigate the gene expressions related to photosynthesis in maize in response to lo...

Journal: :Agronomy 2021

Soil salinity is one of the most important environmental factors threatening agriculture on a global level. Plants show differences in resistance to salt stress, both terms species and variety. The aim study was determine effect stress photosynthetic efficiency activity plants two barley varietie—KWS Irina RGT Planet. grown pot experiment were subjected soil treatment with sodium chloride (NaCl...

In order to evaluate the tolerance of some almond genotypes to salinity a pot experiment was carried out with 3 factors cultivar in 11 levels including Touno, Nonparaeil, Mamaie, Shokofeh, Sahand, Fragness, 1- 16, 1-25, A200,13-40 and GF677 and salinity in five levels including 0, 1.2, 2.4, 3.6 and 4.8 g/l of sodium chloride with electrical conductivity 0.5, 2.5, 4.9, 7.3 and 9.8 ds/m, respecti...

2013
Katarína OLŠOVSKÁ Marek ŽIVČÁK Petra DREVEŇÁKOVÁ

The collection of 10 parental lines of tetraploid wheat genotypes with various origin was cultivated in growth chamber. Leaf and growth traits such as assimilation pigments content, dry mass and leaf area of plants were measured. The genotype differences were recognized by chlorophyll a fluorescence fast kinetics method applied on penultimate young wheat leaves. Consequently, heat stress suscep...

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