نتایج جستجو برای: photosynthetic parameters

تعداد نتایج: 598969  

Journal: :Biophysical journal 1980
J A Nairn R Friesner H A Frank K Sauer

We have developed a new approach to the theory of linear dichroism in partially ordered systems. The description of the partially ordered ensemble uses a density of states function, D(theta, phi, approximately delta), which gives the probability that the direction of polarization for incident polarized light has spherical angles theta and phi in an axis system fixed with respect to the molecule...

2010
Sander W. Hogewoning Govert Trouwborst Hans Maljaars Hendrik Poorter Wim van Ieperen Jeremy Harbinson

The blue part of the light spectrum has been associated with leaf characteristics which also develop under high irradiances. In this study blue light dose-response curves were made for the photosynthetic properties and related developmental characteristics of cucumber leaves that were grown at an equal irradiance under seven different combinations of red and blue light provided by light-emittin...

Journal: :پژوهش های تولید گیاهی 0
وحید اکبرپور حسین آروئی عضو هیات علمی کامبیز مشایخی عضو هیات علمی مجید عزیزی آرانی عضو هیات علمی محمدعلی بهمنیار عضو هیات علمی

background and objectives: active coal is applied in tissue culture media as the absorbant of phenolic compounds and toxic materials; but no research has been done regarding its direct application like spray on plants. application of this material as the carbone source is based on researches done by sucrose; which had highly positive effect on plant growth and development. thus; a hypothesis wa...

2014
Fang-Min Li Zhi-Guo Lu Ming Yue

Mung bean has been reported to have antioxidant, antidiabetic, anti-inflammatory, and antitumor activities. Various factors have important effects on the types and contents of plant chemical components. In order to study quality of mung bean from different light sources, mung bean seedlings were exposed to red light-emitting diodes (LEDs) and ultraviolet-B (UV-B). Changes in the growth paramete...

Journal: :Molecules 2013
Ali Ghasemzadeh Hawa Z E Jaafar

The effect of foliar salicylic acid (SA) applications (10⁻³ and 10⁻⁵ M) on activities of nitrate reductase, guaiacol peroxidase (POD), superoxide dismutases (SOD), catalase (CAT) and proline enzymes and physiological parameters was evaluated in two ginger varieties (Halia Bentong and Halia Bara) under greenhouse conditions. In both varieties, tested treatments generally enhanced photosynthetic ...

2016
Xiubo Wang Lifang Wang Zhouping Shangguan

Water and nitrogen supply are the two primary factors limiting productivity of wheat (Triticum aestivum L.). In our study, two winter wheat varieties, Xinong 979 and large-spike wheat, were evaluated for their physiological responses to different levels of nitrogen and water status during their seedling stage grown in a phytotron. Our results indicated that drought stress greatly reduced the ne...

2017
Ginga Shimakawa Satoru Watanabe Chikahiro Miyake

A limitation in carbon dioxide (CO₂), which occurs as a result of natural environmental variation, suppresses photosynthesis and has the potential to cause photo-oxidative damage to photosynthetic cells. Oxygenic phototrophs have strategies to alleviate photo-oxidative damage to allow life in present atmospheric CO₂ conditions. However, the mechanisms for CO₂ limitation acclimation are diverse ...

2016
Jee Hoon Kim Joon Woo Lee Tae In Ahn Jong Hwa Shin Kyung Sub Park Jung Eek Son

Canopy photosynthesis has typically been estimated using mathematical models that have the following assumptions: the light interception inside the canopy exponentially declines with the canopy depth, and the photosynthetic capacity is affected by light interception as a result of acclimation. However, in actual situations, light interception in the canopy is quite heterogenous depending on env...

Journal: :Annals of botany 2002
H Medrano J M Escalona J Bota J Gulías J Flexas

We review the photosynthetic responses to drought in field-grown grapevines and other species. As in other plant species, the relationship between photosynthesis and leaf water potential and/or relative water content in field-grown grapevines depends on conditions during plant growth and measurements. However, when light-saturated stomatal conductance was used as the reference parameter to refl...

2002
A. M. Savage H. Trapido-Rosenthal A. E. Douglas

The photosynthetic response to irradiance (PI response) of dinoflagellate algae of the genus Symbiodinium was quantified immediately after isolation from symbiosis with 9 species of corals and allied taxa on Bermuda. Significant variation in PI parameters was identified among the algal isolates, but no consistent differences between representatives of different Symbiodinium phylotypes were obta...

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