نتایج جستجو برای: 06 was sprayed on young fully expanded leaves

تعداد نتایج: 10025235  

2000
D. M. Yeh L. Lin C. J. Wright

Effects of de®ciencies in N, P, K, Ca, Mg, B and Fe on leaf development, visual symptoms and shoot±root dry weight ratio were studied in Spathiphyllum `Sensation' grown hydroponically. Leaf nutrient contents of treated plants were analyzed to con®rm suspected de®ciencies. Leaf number, leaf area and chlorophyll content were all signi®cantly reduced in the nitrogen-de®cient plants similar to plan...

Journal: :Plant physiology 1997
L Xu S Zheng L Zheng X Wang

The expression of a castor bean (Ricinus communis L.) phospholipase D (PLD; EC 3.1.4.4) gene has been studied by examining its promoter activity in transgenic tobacco (Nicotiana tabacum) carrying a PLD promoter-glucuronidase transgene and by monitoring the levels of PLD mRNA in castor bean. Sequence and the 5' truncation analyses revealed that the 5' flanking region from nucleotide -1200 to -73...

Journal: :Plant physiology 1963
D Shimshi

When sprayed on plant leaves, several compounds, notably phenylmercuric acetate (PMA), can induce stomatal closure (16, 17). Most of these investigations with PMA were carried out on detached leaves with petioles dipping in water; it was found that the stomatal closing markedly reduced transpiration, whereas photosynthesis was reduced to a lesser extent. In these experiments it was demonstrated...

Journal: :Tree physiology 2000
Roslyn M. Gleadow Ian E. Woodrow

The release of hydrogen cyanide from endogenous cyanide-containing compounds in plants is an effective herbivore deterrent. We investigated temporal and spatial variations in cyanogenic glycoside concentration in greenhouse-grown seedlings and 6-year-old plantation trees of Eucalyptus cladocalyx F. Muell., which allocates up to 20% of leaf nitrogen to the cyanogenic glycoside, prunasin. The hig...

Journal: :Plant physiology 2010
Vasiliki Falara Eran Pichersky Angelos K Kanellis

The resin of Cistus creticus subsp. creticus, a plant native to Crete, is rich in labdane-type diterpenes with significant antimicrobial and cytotoxic activities. The full-length cDNA of a putative diterpene synthase was isolated from a C. creticus trichome cDNA library. The deduced amino acid sequence of this protein is highly similar (59%-70% identical) to type B diterpene synthases from othe...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1962
I Zelitch P E Waggoner

In the preceding communication' it was shown that phenylmercuric acetate sprayed upon detached leaves brings about closure of the stomata and thereby diminishes the diffusion of water from the leaves and of CO2 into the leaves. In 9 out of 11 experiments, induced closure of stomata reduced transpiration relatively more than CO2 assimilation as predicted from diffusion theory. This work led to e...

ژورنال: علوم آب و خاک 2002
لک, محمد رضا, بهار, مسعود , شمس بخش, مسعود ,

During the summer of 1998, leaf and pod blight symptoms of bean were observed in Arak, The survey in the following year showed that the disease had an increasing trend in bean-growing regions of Markazi Province. It appeared that more severe losses occurred in fields equipped with sprinkler irrigation system. Symptoms of diseased plants consisted of formation of irregular necrotic lesions on le...

لک, محمد رضا, بهار, مسعود , شمس بخش, مسعود ,

During the summer of 1998, leaf and pod blight symptoms of bean were observed in Arak, The survey in the following year showed that the disease had an increasing trend in bean-growing regions of Markazi Province. It appeared that more severe losses occurred in fields equipped with sprinkler irrigation system. Symptoms of diseased plants consisted of formation of irregular necrotic lesions on le...

Journal: :Revista de biologia tropical 2004
Gerardo Avalos Stephen S Mulkey

We explored the short-term adjustment in photochemical efficiency (Fv/Fm) in adult and young leaves of the understory neotropical shrub Psychotria limonensis Krause (Rubiaceae) in response to rapid changes in the light environment. Leaves were collected from 20 individual plants growing under sun and shade conditions on Gigante Peninsula, Barro Colorado Natural Monument (Republic of Panama), du...

Journal: :کنترل بیولوژیک آفات و بیماری های گیاهی 0
حسن عسکری دانشیار ، پردیس ابوریحان ، دانشگاه تهران کیمیا کوهستانی دانشجوی کارشناسی ارشد پردیس ابوریحان، دانشگاه تهران مهدی ضرابی استادیار ، گروه گیاه پزشکی پردیس ابوریحان ، دانشگاه تهران احمد بغدادی استادیار دانشگاه پیام نور، استان تهران

pathogenicity of beauveria bassiana strain debi001, lecanicillium muscarium strain daom 198499 and their combination was investigated on 2nd nymphs and adults of b. tabaci in lab condition (in a germinator, 23±1ºc, 95±5% and 16:8 l:d). five concentrations of each fungi were sprayed on undersides of young eggplant leaves that involved 2nd nymphs. experiments were carried out on adults with the s...

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