نتایج جستجو برای: chlorophyll fluorescence parameters

تعداد نتایج: 696668  

2011
C. Frankenberg A. Butz G. C. Toon

[1] Global retrieval of solar induced fluorescence emitted by terrestrial vegetation can provide an unprecedented measure for photosynthetic efficiency. The GOSAT (JAXA, launched Feb. 2009) and OCO‐2 (NASA, to be launched 2013) satellites record high‐resolution spectra in the O2 A‐band region, overlapping part of the chlorophyll fluorescence spectrum. We show that fluorescence cannot be unambig...

Journal: :به نژادی گیاهان زراعی و باغی 0
فرهاد کرمی دانشجوی دکتری گروه علوم باغبانی دانشکده کشاورزی دانشگاه بوعلی سینا، همدان منصور غلامی استاد گروه علوم باغبانی، دانشکدۀ کشاورزی، دانشگاه بوعلی سینا، همدان احمد ارشادی دانشیار گروه علوم باغبانی دانشکده کشاورزی، دانشگاه بوعلی سینا، همدان عادل سی و سه مرده دانشیار گروه زراعت و اصلاح نباتات، دانشکدۀ کشاورزی، دانشگاه کردستان، سنندج

in this study, the winter cold tolerance of seven strawberry cultivars was evaluated using a rcbd design with a split plot arrangement at bu-ali sina university in 2014. after exposure of plants to low temperatures (+4, -5, -10, -15, -20 and -25oc), the values of electrolyte leakage, index of freeze injury, rwc, total chlorophyll and chlorophyll fluorescence parameters (f0, fm, fv and fv/fm) we...

ژورنال: علوم آب و خاک 2011
امیرحسین خوشگفتارمنش, , حمید رضا عشقی زاده , , محمد کافی, , پرویز احسان‌زاده, ,

The growth and fluorescence parameters of chlorophyll in four corn hybrids including two sweet (K.S.C. 403 and K.S.C. 404) and two grain hybrids (S.C. 500 and S.C. 700) were evaluated in response to Fe and Zn nutrition in a nutrient solution culture. This study was conducted in a randomized complete block design with a factorial arrangement with three replications at the Soilless Culture Resear...

Journal: :Journal of experimental botany 2004
Neil R Baker Eva Rosenqvist

Chlorophyll fluorescence has been routinely used for many years to monitor the photosynthetic performance of plants non-invasively. The relationships between chlorophyll fluorescence parameters and leaf photosynthetic performance are reviewed in the context of applications of fluorescence measurements to screening programmes which seek to identify improved plant performance. The potential role ...

Journal: :چغندرقند 0
سمر خیامیم استادیار موسسه تحقیقات اصلاح و تهیه بذر چغندرقند محمد رضا جهاداکبر مربی مرکز تحقیقات کشاورزی و منابع طبیعی اصفهان حمید نوشاد مربی موسسه تحقیقات چغندرقند فرانک روزبه مربی موسسه تحقیقات چغندرقند لیلا زاویه مودت کارشناس ارشد سازمان جهاد کشاورزی آذربایجان غربی

determination of chlorophyll content and chlorophyll fluorescence has the potential needed to analyze the efficiency of photosynthesis in plants against environmental stresses, especially salinity, and its simplicity facilitates stress evaluation. in order to study the response of different photosynthetic characters to salinity stress at different sugar beet growth stages, two separate experime...

2012
E. Khaleghi K. Arzani N. Moallemi

This study was conducted to determine effect of water stress on chlorophyll content and chlorophyll fluorescence parameter in young `Dezful’ olive trees. Three irrigation regimes (40% ETcrop, 65% ETcrop and 100% ETcrop) were used. After irrigation treatments were applied, some of biochemical parameters including chlorophyll a, b, total chlorophyll, chlorophyll fluorescence and also chlorophyll ...

A. Dezhban al et

Afforestation of contaminated areas is considered as a possible strategy for reduction of contaminations. In the present study, the effects of lead (Pb) and cadmium (Cd) were investigated on chlorophyll fluorescence parameters (Fv/Fm, Fo, and Fm), photosynthetic pigments (chlorophyll a, b, and total chlorophyll), and proline in one-year-old seedlings of Celtis caucasica and Robinia pseudoacacia...

Journal: :caspian journal of environmental sciences 2014
al et a. dezhban

afforestation of contaminated areas is considered as a possible strategy for reduction of contaminations. in the present study, the effects of lead (pb) and cadmium (cd) were investigated on chlorophyll fluorescence parameters (fv/fm, fo, and fm), photosynthetic pigments (chlorophyll a, b, and total chlorophyll), and proline in one-year-old seedlings of celtis caucasica and robinia pseudoacacia...

Journal: :پژوهش های تولید گیاهی 0
یاسر یعقوبیان گروه زراعت و اصلاح نباتات، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان سید عطاءالله سیادت گروه زراعت و اصلاح نباتات، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان محمدرضا مرادی تلاوت گروه زراعت و اصلاح نباتات، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان همت اله پیردشتی گروه زراعت، پژوهشکده ژنتیک وزیست فناوری کشاورزی طبرستان، دانشگاه علوم کشاورزی و منابع طبیعی ساری

in order to quantify and simulate the response of lemon balm (melissa officinalis l.) plants to cadmium (cd) concentrations in the soil, a pot experiment was conducted using completely randomized design (crd) with three replicates during 2014. the treatment consisted of twelve cd concentrations from 0 to 300 mg kg-1 of cd in the soil which was mixed with the experimental soil before planting. l...

حسینی, حدیث, حمیدپور, محسن, دشتی, حسین, رنجبرکریمی, رضا, شمشیری, حسین, شیرانی, حسین,

Heavy metals decrease plant growth due to disorder in enzyme activities and destroying of protein structure. Since corn is an important crop in human and poultry nutrition, in this greenhouse experiment, the effect of modified polyacrylamide and montmorillonite on growth parameters and chlorophyll fluorescence of corn (Zea mays L.) grown in two polluted soils with Cd and Pb (sandy and sandy loa...

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