نتایج جستجو برای: fv fm

تعداد نتایج: 15145  

2014
Denise Johnstone Michael Tausz Gregory Moore Marc Nicolas

Wood structure and wood anatomy are usually considered to be largely independent of the physiological processes that govern tree growth. This paper reports a statistical relationship between leaf and bark chlorophyll fluorescence and wood density. A relationship between leaf and bark chlorophyll fluorescence and the quantity of wood decay in a tree is also described. There was a statistically s...

2013
Suriyan Cha-um Thapanee Samphumphuang Chalermpol Kirdmanee

We investigated the role of GlyBet (100 mM) applied exogenously in alleviating water-deficit induced stress in indica rice cv. Pathumthani 1 (PT1). Exogenous GlyBet increased proline concentration in the leaf tissues of water deficit stressed plants depend on a degree of soil water content (SWC), especially at severe water deficit (25% SWC). Foliar GlyBet (100 mM) significantly enhanced chlorop...

2007
David D. Ackerly

Evolutionary variation for accumulation of small heat shock protein (sHsp) may contribute to thermal niche differentiation between species. Here e examine temperature and time-course-dependent variation for sHsp accumulation in a recently diverged pair of Encelia raised in a common environment: Encelia farinosa, common in the Mojave desert, and Encelia californica, which is found along the cool...

Journal: :The Journal of experimental biology 2008
Lisa J Rodrigues Andréa G Grottoli Michael P Lesser

Chlorophyll fluorescence has been used to predict and monitor coral bleaching over short timescales (hours to days), but long-term changes during recovery remain largely unknown. To evaluate changes in fluorescence during long-term bleaching and recovery, Porites compressa and Montipora capitata corals were experimentally bleached in tanks at 30 degrees C for 1 month, while control fragments we...

2013
He-ping Jiang Bing-bing Gao Wen-hui Li Ming Zhu Chun-fang Zheng Qing-song Zheng Chang-hai Wang

Responses of Ulva prolifera and Ulva linza to Cd(2+) stress were studied. We found that the relative growth rate (RGR), Fv/Fm, and actual photochemical efficiency of PSII (Yield) of two Ulvaspecies were decreased under Cd(2+) treatments, and these reductions were greater in U. prolifera than in U. linza. U. prolifera accumulated more cadmium than U. linza under Cd(2+) stress. While U. linza sho...

Journal: :Environmental toxicology and chemistry 2003
Christopher A Marwood K T Jim Bestari Robert W Gensemer Keith R Solomon Bruce M Greenberg

To assess photosynthesis as a bioindicator of toxicity from polycyclic aromatic hydrocarbons (PAHs), the response of chlorophyll-a fluorescence to creosote exposure was compared with effects on population-level plant growth. Large, outdoor, freshwater microcosms containing Eurasian watermilfoil (Myriophyllum spicatum) received either a single application or multiple applications of liquid creos...

The current experiment was designed to evaluate the effect of plant growth promoting rhizobactria (PGPR) on chlorophyll fluorescence and some physiological parameters in basil (Ocimum basilicum L.) leaf under salinity stress. The experiment was conducted in factorial arrangement based on completely randomized design. Treatments were four levels of salt stress (0, 40, 80 and 120 mM of NaCl) and ...

2001

13353 BI-H-1013-001 HONORS BIOL OF THE CELL U 3 GRIPPO A MTG1-TR 0930AM-1100AM LSE 207 10990 EN-H-1013-001 HONORS FR ENGLISH II U 3 MCGHEE R MTG1-MWF 0900AM-0950AM W 315 10991 EN-H-1013-002 HONORS FR ENGLISH II U 3 SCHICHLER R MTG1-TR 1100AM-1215PM LIB 103B 10992 EN-H-1013-003 HONORS FR ENGLISH II U 3 CHAPPEL D MTG1-MWF 1200PM-1250PM LIB 103B 10993 EN-H-2013-001 HNRS INTRO LIT II U 3 COLLINS J ...

Journal: :Agronomy 2023

The chlorophyll fluorescence parameter Fv/Fm plays a significant role in indicating the photosynthetic function of plants. existing technical methods used to measure are often inefficient and cumbersome. To realize fast non-destructive monitoring Fv/Fm, this study took rice under different fertilizer treatments measured hyperspectral reflectance information data leaves during whole growth perio...

Journal: :Horticulturae 2022

Rhododendron species are typical calcifuges that do not grow well in calcareous soils characterized by alkaline pH and high concentrations of Ca2+. In this study, we investigated the effects three levels a Ca2+ treatment on vitro germination seedling growth species: R. chihsinianum, fortunei, vernicosum. Alkaline had no significant effect parameters (gMAX, mean time uniformity) but significantl...

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