نتایج جستجو برای: seedling parameters

تعداد نتایج: 592121  

Journal: :Plant physiology 1997
J. E. King D. J. Gifford

The mobilization and utilization of the major storage proteins in loblolly pine (Pinus taeda L.) seeds following imbibition were investigated. Most of the seed protein reserves were contained within the megagametophyte. Breakdown of these proteins occurred primarily following radicle emergence and correlated with a substantial increase in the free amino acid pool in the seedling; the majority o...

2016
Wei Wang Scott B. Franklin Zhijun Lu Brian J. Rude

Gregarious flowering of bamboo species impacts ecosystem properties and conservation, but documentation of these periodic events is difficult. Here, we compare the characteristics of flowering sites and un-flowered patches of an arrow bamboo (Fargesia qinlingensis) in the Qinling Mountains, China, over a 5-year period (2003-2007) after a mast flowering event (2003). We examined flowering culm a...

Journal: :بوم شناسی کشاورزی 0
حامد هادی نانسی بابائی جهانفر دانشیان محمد حسین ارزانش آیدین حمیدی

seedling characteristics of different sunflower (helianthus annus l.) cultivars under drought stress and inoculation with the azospirillum lipoferum in a spilt-factorial layout based on randomized complete block design with three replications were evaluated. treatments included dehydration stress (seed produced on maternal plants which irrigated after 60 (desirable irrigation), 120 (medium stre...

Journal: :Acta Ecologica Sinica 2021

In this study, the effect of seed priming using ascorbic acid (ASA) on three commercial wheat cultivars i.e., Punjab-2011, Faisalabad-2008, and Ujala-2016 under salinity stress in both homogenous heterogeneous environments has been investigated. It revealed that different levels have significantly reduced growth attributes like percent germination, germination index, radical & plumule length, v...

2008
Hakan YILDIRIM Engin TILKAT Ahmet ONAY Hasan.Çetin OZEN

An in vitro zygotic embryo germination protocol was developed for apricot (Prunus armeniaca L. “Hacıhaliloğlu”). A hundred percent of germination was obtained when isolated embryos were cultured in vitro, a result alike those reported in the literature with traditional dormancy breaking treatments. In vitro seedling development was optimal in a modified full-strength Murashige and Skoog (1962) ...

Journal: :Plant physiology 1967
M N Christiansen

Cotton seedlings were subjected to a 96 hour chilling treatment (5 degrees or 10 degrees ) after periods of germination at 31 degrees ranging from 0 to 48 hours. Inhibition of subsequent growth at a favorable temperature by chilling was dependent on level of low temperature and stage of seedling development when chilled. Two periods of chilling hypersensitivity were observed during germination:...

Journal: :Annals of botany 2011
R Lutz Eckstein Eva Pereira Ann Milbau Bente Jessen Graae

BACKGROUND AND AIMS A meta-analysis of global change experiments in arctic tundra sites suggests that plant productivity and the cover of shrubs, grasses and dead plant material (i.e. litter) will increase and the cover of bryophytes will decrease in response to higher air temperatures. However, little is known about which effects these changes in vegetation structure will have on seedling recr...

Journal: :American journal of botany 2007
José Luis Quero Rafael Villar Teodoro Marañón Regino Zamora Lourens Poorter

Three hypotheses have been proposed to explain the functional relationship between seed mass and seedling performance: the reserve effect (larger seeds retain a larger proportion of reserves after germinating), the metabolic effect (seedlings from larger seeds have slower relative growth rates), and the seedling-size effect (larger seeds produce larger seedlings). We tested these hypotheses by ...

Journal: :Plant biology 2015
R Milla J Morente-López

The most vulnerable stage in the life of plants is the seedling. The transition from wild to agricultural land that plants experienced during and after domestication implied a noticeable change in the seedlings' environment. Building on current knowledge of seedling ecology, and on previous studies of cassava, we hypothesise that cultivation should have promoted epigeal germination of seedlings...

2012
David S. Dyson Edward F. Loewenstein Steven B. Jack Dale G. Brockway

Selection silviculture has become increasingly common for longleaf pine management, yet questions remain regarding residual canopy effects on seedling survival and growth. To determine what levels of residual overstory promote adequate seedling recruitment, 600 containerized longleaf pine seedlings were planted on two sites during the 2007-2008 dormant season. To differentiate overstory from un...

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