نتایج جستجو برای: lemna
تعداد نتایج: 882 فیلتر نتایج به سال:
به منظور تدوین فلور گیاهان آبزی ایران تیره های najadaceae و lemnaceae مطالعه گردید. در بین نمونه ها گونه های najas gracillima از استان خوزستان و lemna perpusilla از استان فارس برای اولین بار جمع آوری و شناسایی شد. در این مقاله گونه های مذکور از ایران معرفی و کلید شناسایی جنس های najas و lemna برای گونه های شناخته شده از ایران ارائه می شود.
Acinetobacter calcoaceticus P23 is a plant growth-promoting bacterium that was isolated from the surface of duckweed (Lemna aoukikusa). The bacterium was observed to colonize on the plant surfaces and increase the chlorophyll content of not only the monocotyledon Lemna minor but also the dicotyledon Lactuca sativa in a hydroponic culture. This effect on the Lactuca sativa was significant in nut...
The inhibition of flowering of Lemna perpusilla Torr. strain 6746 caused by a light break can be partially reversed by treatment with actinomycin D or 2-thiouracil. Actinomycin D is most active in reversing the response to a light break if the inhibitor is present in the fronds at the time the light break is administered.
Offspring quality decreases with parental age in many taxa, with offspring of older parents exhibiting reduced life span, reproductive capacity, and fitness, compared to offspring of younger parents. These "parental age effects," whose consequences arise in the next generation, can be considered as manifestations of parental senescence, in addition to the more familiar age-related declines in p...
A new method is described for measuring environmental stress through the use of the duckweed (Lemna minor) rhizosphere.
Short term inhibitor treatment can be used to examine the processes that occur during an inductive dark period in the short day plant Lemna perpusilla Torr., strain 6746. Several inhibitors of protein biosynthesis are most effective in reducing per cent flowering when treatment occurs over the 2-hour intervals beginning at the 12th hour or the 14th hour of a 8 (16) photoperiodic cycle. The anti...
به منظور تدوین فلور گیاهان آبزی ایران تیره های Najadaceae و Lemnaceae مطالعه گردید. در بین نمونهها گونههای Najas gracillima از استان خوزستان و Lemna perpusilla از استان فارس برای اولین بار جمعآوری و شناسایی شد. در این مقاله گونههای مذکور از ایران معرفی و کلید شناسایی جنسهای Najas و Lemna برای گونههای شناخته شده از ایران ارائه میشود.
Introduction: Chromium is among the important heavy metals which is found in most industrial wastes and is associated with both health and environmental risks. Therefore, this study tries to analyze the efficiency of lemna and azolla powders in removing hexavalent chromium from aqueous solutions. Methods: As an experimental trial, this study was conducted experimentally in the lab scale. Initia...
A new phytotoxicity test method based on root elongation of three Lemna species (Lemna gibba, L. minor, and L. paucicostata) has been developed. Tests with aquatic plants have, typically, favored measurements on fronds (e.g. frond number, area, biomass) rather than on roots, due, in part, to issues associated with handling fragile roots and the time-consuming procedures of selecting roots with ...
Circadian rhythms are found in organisms from cyanobacteria to plants and animals. In flowering plants, the circadian clock is involved in the regulation of various physiological phenomena, including growth, leaf movement, stomata opening, and floral transitions. Molecular mechanisms underlying the circadian clock have been identified using Arabidopsis (Arabidopsis thaliana); the functions and ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید