نتایج جستجو برای: seed leaves

تعداد نتایج: 152725  

Journal: :The Plant cell 2010
Idan Efroni Yuval Eshed Eliezer Lifschitz

The leaves of seed plants evolved from a primitive shoot system and are generated as determinate dorsiventral appendages at the flanks of radial indeterminate shoots. The remarkable variation of leaves has remained a constant source of fascination, and their developmental versatility has provided an advantageous platform to study genetic regulation of subtle, and sometimes transient, morphologi...

2000
W. F. HUNT

Mature perennial ryegrass plants in pastures persist through the asexual reproduction of the tiller. Leaves are initiated from the flanks of the tiller stem apex. Generally, two leaves arc growing on a tiller at any one time. New tiller buds may arise from the axils of mature leaves depending on environmental conditions. Flowering results from a physiological change at the stem apex, which then...

Journal: :پژوهش های تولید گیاهی 0
جهانفر دانشیان دانشیار موسسه تحقیقات کرج حمید جباری دانشگاه داوران

in order to study of some effective phenologic and physiologic characteristics on 18 sunflower hybrids yield under optimum conditions, an experiment was conducted as randomized complete block design with three replications at the research field of seed and plant improvement institute-karaj in 2006-2007. the result indicated that the hybrids showed significant difference in phonologic characteri...

Journal: :Development 2004
Connie Champagne Neelima Sinha

The leaves of seed plants can be classified as being either simple or compound according to their shape. Two hypotheses address the homology between simple and compound leaves, which equate either individual leaflets of compound leaves with simple leaves or the entire compound leaf with a simple leaf. Here we discuss the genes that function in simple and compound leaf development, such as KNOX1...

Journal: :Journal of experimental botany 2011
Christiane Seiler Vokkaliga Thammegowda Harshavardhan Kalladan Rajesh Palakolanu Sudhakar Reddy Marc Strickert Hardy Rolletschek Uwe Scholz Ulrich Wobus Nese Sreenivasulu

Drought is one of the most severe environmental stress factors limiting crop yield especially when occurring during anthesis and seed filling. This terminal drought is characterized by an excess production of the phytohormone abscisic acid (ABA) which plays an important role during seed development and dormancy. All the genes putatively involved in ABA biosynthesis and inactivation in barley we...

Journal: :Journal of experimental botany 2003
G Spano N Di Fonzo C Perrotta C Platani G Ronga D W Lawlor J A Napier P R Shewry

Four mutants with delayed leaf senescence were selected from seed of durum wheat mutagenized with ethylmethane sulphonate. Changes in net photosynthetic rate, efficiency of photosystem II and chlorophyll concentration during the maturation and senescence of the flag leaves of both mutant and parental plants were determined under glasshouse conditions. The four mutant lines maintained photosynth...

2013
G. Thirumaran M. Arumugam R. Arumugam

The present study an attempt has been made to investigate the effect of Seaweed Liquid Fertilizer of Rosenvigea intricata with or without chemical fertilizer on seed germination, growth, yield, pigment content and soil profile of Abelmoschus esculentus was analyzed. The seed germination, shoot length, root length, number of lateral roots, number of leaves, number of vegetables, length of vegeta...

2010
GORDANA S. TIMOTIJEVIĆ MIRA Đ. MILISAVLJEVIĆ SVETLANA R. RADOVIĆ M. M. KONSTANTINOVIĆ VESNA R. MAKSIMOVIĆ

Aspartic proteinase gene (FeAP12) has been isolated from the cDNA library of developing buckwheat seeds. Analysis of its deduced amino acid sequence showed that it resembled the structure and shared high homology with typical plant aspartic proteinases (AP) characterized by the presence of a plant-specific insert (PSI), unique among APs. It was shown that FeAP12 mRNA was not present in the leav...

Journal: :Fitoterapia 2003
Hiroyoshi Moriyama Toru Iizuka Masahiro Nagai Yoshimi Murata

Kaempferol-3-O-gentiobioside, the major flavonoid glycoside in Indonesian Cassia alata was quantified in various parts of the plant. The mature leaf was found to contain the highest content of this metabolite. A decrease of the flavonoid content in the juvenile leaf during the period of October through December was also observed. The contents ranged from 2.0 to 5.0% and 1.0 to 4.0% in mature an...

2007
Robert P. Adams

Based on analyses of terpenoids, nrDNA and trnC-D SNPs as well as morphology and ecology, a new cryptic species, Juniperus maritima, from the Puget Sound region is recognized. The species, previously included in J. scopulorum, is characterized by having seed cones that mature in one year (14-16 months), seeds usually exserted from the cone, obtuse scale leaf tips, usually reniform seed cones, s...

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