in conventional agricultural systems application of fungicide and pesticides for seed treatment had been extended in wide range. this study was conducted to evaluate the effects of seed treatment on seed vigor indices on back cross roshan of wheat cultivar in vitro status during 2007. the experiment was done in a completely randomized factorial design with eight replications. treatment were inc...

The rise in atmospheric CO(2) concentration coupled with its direct, often positive, effect on the growth of plants raises the question of the response of invasive plants to elevated atmospheric CO(2) levels. Response of two invasive weeds [purple nutsedge (Cyperus rotundus L.) and yellow nutsedge (Cyperus esculentus L.)] to CO(2) enrichment was tested. Plants were exposed to ambient (375 micro...

In this study, one rice population of recombinant inbred lines (RILs) was used to determine the genetic characteristics of seed reserve utilization during the early (day 6), middle (day 10) and late (day 14) germination stages. The seedling dry weight (SDW) and weight of the mobilized seed reserve (WMSR) were increased, while the seed reserve utilization efficiency (SRUE) decreased, during the ...

According to the importance and diversity of Chenopodium album, Cynodon dactylon and Amaranthus retroflexus in safflower fields and significant role of safflower (Carthamus tinctorius L.) as an oil seed, an experiment was conducted using CRD based factorial design with three replications to study the allelopathic effects of root and shoot extracts of these weeds on germination and early growth ...

Final soil manipulation before seed germination occurs during the planting operation. Contact force of depth‐gauge wheels adjacent to the seed opener potentially alters the environment for corn seed germination and early plant growth. A field experiment was conducted measuring seed spacing, spacing variability, seed depth, emergence rate, plant dry matter, final stand, crop growth stage, and ex...

Three genes from the T(R) region of pTi15955 were introduced into tobacco (Nicotiana tabacum L.) to direct the synthesis of the mannityl opines from hexose sugars and glutamine or glutamate. Opines were present in all tissue types tested and accumulated to levels of 100 to 150 micrograms per milligram dry weight in root, stem, and leaf tissues. Opine-producing plants appeared normal with respec...

The accumulations and partitions of mineral elements and dry matter in upland cotton plants were followed: A, at five-day intervals for thirty days starting with the seed with the plants growing in Hoagland's solution in a warm-to-hot summer greenhouse, and B, at 15-day intervals from thirty days after planting to maturity in field plantings. The latter data are not original but are recalculate...

extended abstractbackground and objectives: loquats have formed different ecological types during their cultivation and adaptation in different parts of the world. the first step in the breeding operation is the identifying of the spread center accompanied the studying of the variation between genotypes. in this research, 20 loquat genotypes were evaluated using fruit morphological markers to i...