نتایج جستجو برای: photosynthetic parameters

تعداد نتایج: 598969  

Journal: :Plant physiology 1984
D T Manning T M Chen A J Campbell N E Tolbert E W Smith

The effects of various chemical treatments upon photosynthesis, soluble leaf protein, CO(2) compensation point, and leaf light transmission in soybean, Glycine max (L.) Merr., seedlings were examined following varying response periods after application at 14 to 17 days postemergence. The compounds N(6)-benzyladenine (BA), 2-(4-chlorophenoxy)-2-methylpropanoic acid (CPMP), (4-chlorophenoxy)aceti...

Journal: :Applied and environmental microbiology 2009
Natalya Yutin Marcelino T Suzuki Mira Rosenberg Denisse Rotem Michael T Madigan Jörg Süling Johannes F Imhoff Oded Béjà

To detect anoxygenic bacteria containing either type 1 or type 2 photosynthetic reaction centers in a single PCR, we designed a degenerate primer set based on the bchY gene. The new primers were validated in silico using the GenBank nucleotide database as well as by PCR on pure strains and environmental DNA.

2018
Xia Chen Jianguo Gao Ping Zhao Heather R. McCarthy Liwei Zhu Guangyan Ni Lei Ouyang

An increasing body of evidence has shown that nighttime sap flux occurs in most plants, but the physiological implications and regulatory mechanism are poorly known. The significance of corticular photosynthesis has received much attention during the last decade, however, the knowledge of the relationship between corticular photosynthesis and nocturnal stem sap flow is limited at present. In th...

اسما میلادی لاری پرویز احسان زاده

Drought is considered as the most important constraint to world’s crop production. Furthermore arid and semiarid climate accounts for nearly most of terrestrial areas of Iran. Therefore in order to study the effect of irrigation regimes on growth, physiological attributes and grain yield as well as components of such a crop plant as safflower a 4-replicate split plot RCBD field study was perfor...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
William L Bauerle Ram Oren Danielle A Way Song S Qian Paul C Stoy Peter E Thornton Joseph D Bowden Forrest M Hoffman Robert F Reynolds

Although temperature is an important driver of seasonal changes in photosynthetic physiology, photoperiod also regulates leaf activity. Climate change will extend growing seasons if temperature cues predominate, but photoperiod-controlled species will show limited responsiveness to warming. We show that photoperiod explains more seasonal variation in photosynthetic activity across 23 tree speci...

Journal: :iranian journal of science and technology (sciences) 2012
m. shariati

the changes of chl a fluorescence induction curve in response to different salinity levels in canola (barassica napus, l.) plants were investigated. the canola seedlings were exposed to salt stress (100 mm and 200 mm nacl) for 7 days and chl a fluorescence induction kinetics was analysed. by using the ojip-test, various parameters like vj, area, n, φpo, φeo, ψo, rc/abs and piabs were calculated...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2007
Elizabeth L Read Gregory S Engel Tessa R Calhoun Tomás Mancal Tae Kyu Ahn Robert E Blankenship Graham R Fleming

Intermolecular electronic coupling dictates the optical properties of molecular aggregate systems. Of particular interest are photosynthetic pigment-protein complexes that absorb sunlight then efficiently direct energy toward the photosynthetic reaction center. Two-dimensional (2D) ultrafast spectroscopy has been used widely in the infrared (IR) and increasingly in the visible to probe excitoni...

2002
Roderick K. Clayton

The history of research on photosynthetic reaction centers is outlined, starting with the implication of their existence through the discovery of the photosynthetic unit, as reported by R. Emerson and W. Arnold in 1932, and culminating in the crystallization and X-ray analysis of the anoxygenic bacterial reaction centers, reported by J. Deisenhofer, H. Michel, and coworkers, over the period 198...

Journal: :journal of agricultural science and technology 2014
d. neocleous a. koukounaras a. s. siomos m. vasilakakis

the objective of this work was to study the responses of two baby lettuce (lactuca sativa l.) cultivars, namely, green paris island and red sanguine, to different nacl concentrations (0, 5, 10, and 20 mm). the study was conducted in a floating system and plants were harvested at the stage of 5-6 leaves, outside leaf 6-10 cm in length (25 and 31 days after sowing for green and red lettuce, respe...

2006

Signif~cant advances in rapid non-destructive means of measuring the photosynthetic energy conversion of phytoplankton in the ocean have been made in recent years The new techniques offer the potential to obtain detailed spatial and temporal information about photosynthetic rates that cannot be achieved using more traditional methods. A study of a mesoscale coccolithophore bloom in the Northeas...

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