نتایج جستجو برای: chlorophyll pigment content

تعداد نتایج: 452300  

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2012
Peter Horton

The distinctive lateral organization of the protein complexes in the thylakoid membrane investigated by Jan Anderson and co-workers is dependent on the balance of various attractive and repulsive forces. Modulation of these forces allows critical physiological regulation of photosynthesis that provides efficient light-harvesting in limiting light but dissipation of excess potentially damaging r...

2009
C. Abdul Jaleel K. Jayakumar Zhao Chang-Xing

The experiments were conducted in earthen pots lined with polythene sheet to find out the effect of different concentrations of cobalt (0, 50, 100, 150, 200 and 250 mg/kg soil) on various morphological parameters, photosynthetic pigment contents and antioxidant enzyme activities on greengram (Vigna radiata (L.) Wilczek). Plants were watered to field capacity daily. Plants were thinned to a maxi...

2007
M. Henriques A. Silva J. Rocha

The pigment content in microalgae is a specific feature of each species. Its evaluation is essential as an indirect measure of cell growth, as well as a parameter to check the trophic level of waters. Several methods can be found in literature, most of them based on spectrophotometric analyses, referred as a good and practical tool for chlorophyll evaluation. A comparison of different methods t...

Journal: :Plant physiology 2016
Honglei Jin Mengshu Li Sujuan Duan Mei Fu Xiaoxiao Dong Bing Liu Dongru Feng Jinfa Wang Hong-Bin Wang

Maximizing light capture by light-harvesting pigment optimization represents an attractive but challenging strategy to improve photosynthetic efficiency. Here, we report that loss of a previously uncharacterized gene, HIGH PHOTOSYNTHETIC EFFICIENCY1 (HPE1), optimizes light-harvesting pigments, leading to improved photosynthetic efficiency and biomass production. Arabidopsis (Arabidopsis thalian...

Journal: :Int. J. Applied Earth Observation and Geoinformation 2015
Oz Kira Raphael Linker Anatoly A. Gitelson

Leaf pigment content provides valuable insight into the productivity, physiological and phenological status of vegetation. Measurement of spectral reflectance offers a fast, nondestructive method for pigment estimation. A number of methods were used previously for estimation of leaf pigment content, however, spectral bands employed varied widely among the models and data used. Our objective was...

2013
Günter Döhler

UV-B Stress, Pigment and Protein Content, Pure Cultures o f Marine D iatom s Several species o f marine diatoms were grown at + 18 °C and + 2 2 °C under normal air condi­ tions (0.035 vol.% C 0 2) at a light/dark alteration o f 14: 8 h. Intensity o f white light was 1 mW (~ 5000 lux). An artifical nutrient solution o f 35%o salinity was used. Algae harvested during exponential growth — were exp...

Journal: :Applied optics 2007
Annick Bricaud Carlos Mejia David Blondeau-Patissier Hervé Claustre Michel Crepon Sylvie Thiria

Spectral absorption coefficients of phytoplankton can now be derived, under some assumptions, from hyperspectral ocean color measurements and thus become accessible from space. In this study, multilayer perceptrons have been developed to retrieve information on the pigment composition and size structure of phytoplankton from these absorption spectra. The retrieved variables are the main pigment...

In order to evaluate the effect of Inoculation by pseudomonas plant growth promotinh rhizobacteria and  foliar application of boron-nanochelate of pea( Pisum sativum L.) mother plants on germination traits and seedling growth of produced seeds under Cadmium stress a factorial experiment based on completely randomized design with four replications was conducted. Experimental treatments were 12 c...

2015
Jin Liu Jiayu Wang Xiaoyun Yao Yu Zhang Jinquan Li Xiaoxue Wang Zhengjin Xu Wenfu Chen

Chlorophyll content is one of the most important traits controlling crop biomass and economic yield in rice. Here, we isolated a spontaneous rice mutant named thermo-sensitive chlorophyll deficit 1 (tscd1) derived from a backcross recombinant inbred line population. tscd1 plants grown normally from the seedling to tiller stages showed yellow leaves with reduced chlorophyll content, but showed n...

Journal: :The Journal of General Physiology 1946
Sylvia R. Frank

1. Although the carotenoid pigments are present in large concentration in the plastids of etiolated Avena seedlings as compared with protochlorophyll, the pigment precursor of chlorophyll, it is possible to show that the carotenoids do not act as filters of the light incident on the plant in the blue region of the spectrum where they absorb heavily. This suggests that the carotenoids are locate...

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