نتایج جستجو برای: total chlorophyll

تعداد نتایج: 816868  

Tomato (Lycopersicon esculentum Mil.) is one of the most important economical vegetable in the world and its greenhouse production has expanded during the recent years. In this study, the effects of two pruning methods on yield and some fruit quality traits indices of two varieties of tomato (Newton and Oregon) were investigated. In the first experiment (florescence pruning), treatments were ke...

This study was conducted to assay the effects of methanol foliar application (0, 10, 20 and 30% v/v) and bed cover (control, white and black covers) on yield and some physiological traits of marigold as a factorial based on RCBD. The results revealed the significant interaction effects of bed cover and methanol foliar application on chlorophyll a content and plant height. The highest plant heig...

2000

Several groups of chlorophyll-bearing photosynthetic organisms often coexist in anoxic waters. Because of the close similarity between the absorbance spectra of chlorophyll a (in cyanobacteria and algae) and the chlorophylls of green sulfur bacteria (Chl-GSB) it is difficult to distinguish these two groups of organisms where they co-occur. We have developed a simple method to measure both chlor...

Journal: :تولید گیاهان زراعی 0
مجید محمدی دانشجوی کارشناسی ارشد، دانشگاه تربیت مدرس رضاقلی میرفخرایی استادیار دانشگاه تربیت مدرس علیرضا عباسی استادیار دانشگاه تهران

genetic diversity is necessary for breeding program and increasing genetic gain of selection in crop plants. with the onset of spring growth, spring cold stress is a problem for wheat crops at heading and also may be damaged some other parts of this plant. the aim of this study is the investigation of genetic diversity duo to artificial cold stress on the physiological traits, chlorophyll a, ch...

2013
Mohammad Reza Amirjani

In the present investigation Catharanthus roseus, an important herb used in traditional as well as modern medicine, exposed to water deficit stress and possible changes in chlorophyll contents, photosynthesis rate, transpiration rate, growth parameters as well as total alkaloid content and vincristine and vinblastine levels were studied. Seedlings subjected to 4 different water-regimes. Experim...

Journal: :علوم باغبانی ایران 0
حسن فرهادی دانشجوی کارشناسی ارشد، دانشکدۀ کشاورزی، دانشگاه فردوسی مشهد مجید عزیزی استاد، دانشکدۀ کشاورزی، دانشگاه فردوسی مشهد سید حسین نعمتی استادیار، دانشکدۀ کشاورزی، دانشگاه فردوسی مشهد

fenugreek is one of the important medicinal plant that used in the pharmaceutical industry. in order to investigate the effects of salinity stress on relative water content, membrane stability, total chlorophyll, sodium, potassium, sodium to potassium ratio and proline, a factorial experiment was conducted in a completely randomized design with three replications in 2013. experimental treatment...

Journal: :Plant physiology 1945
L Jacobson

That lime-induced chlorosis can be alleviated by the application of iron salts has been recognized for a hundred years. As early as 1845, GRIS (8) treated chlorotic plants with iron and obtained positive results; his experiments have been repeatedly confirmed. Opinions differ widely, however, as to the comparative amount and state of iron in chlorotic leaves. Various investigators have presente...

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...

2015
Ben A. Ward Hans G. Dam

Globally distributed observations of size-fractionated chlorophyll a and temperature were used to incorporate temperature dependence into an existing semi-empirical model of phytoplankton community size structure. The additional temperature-dependent term significantly increased the model's ability to both reproduce and predict observations of chlorophyll a size-fractionation at temperatures be...

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