1. A quantitative study of the growth of Clytia johnstoni is described. 2. The distance between hydranths is most commonly between 3 and 4 mm. The average internode lengths and their variability frequently differs not only between colonies but also between stolons of a single colony. The differences are therefore unlikely to be genetic ones. Occasionally much longer internodes occur (up to 8 mm...

Four genotypes of soybean (Glycine max L. Merr.) were taken for investigation to know their response towards chromium stress. On the basis of seedling growth vigour index and dry weight, the genotypes JS 355 and P 1 were found tolerant to chromium stress when compared to the other genotypes. The tolerant genotypes had shown higher proline contents in their shoots.

Priming is one of the most common methods of improving seed quality. The aim of this experiment was to study the effects of hydroand osmopriming on the germination, vigour and hydrolytic enzymes (α-amylase, β-glucosidase, exopeptidase and lipases) activity of zinnia (Zinnia elegans Jacq.) seeds. Seeds of three cultivars: Jowita, Kirke and Orys, and Z. elegans fl.pl., a mixture of cultivars (Mix...

The breeding of wheat with greater early vigour has potential to increase water- and nutrient-use efficiency, as well as to improve weed competitiveness to raise crop yields profitably. Given that wheat is inherently conservative in its early growth, a sustained breeding effort was initiated to increase genetically seedling leaf area in developing novel high vigour germplasm. A recurrent select...

Background: Accelerated ageing causes seeds to deteriorate that affect the seed quality of groundnut seeds. Seed deterioration will cause metabolic and chemical changes viz., lipid peroxidation autoxidation, leading loss membrane integrity enzyme activities. These are associated with reduced germination vigour. Methods: The cv. VRI 8 was subjected for accelerated at 40oC 100% RH upto 11 days ev...

abstract- this experiment was carried out during the growing seasons of 2010 and 2011 at the agricultural research farm of bu-ali sina university, to study the effect of weed competition on subsequent germination and seed vigour of chickpea. 12 weed interference durations were evaluated in a randomized complete block design with three replications. experiments consisted of two sets of treatment...

The impact of chemical desiccation on yield showed contrasting results depending on seedmoisture content at the time of application. Its effects on seed deterioration are still unknownand could be modified by seed composition. Objectives were to evaluate the impact of chemicaldesiccation on: i) hybrid sunflower seed yield and composition at harvest time, ii) seeddeterioration during long-term s...

This article reviews the brain structures and neural circuitry underlying the motor system as it pertains to endurance exercise. Some obvious phenomena that occur during endurance racing events that need to be explained neurophysiologically are variable pacing strategies, the end spurt, motivation and the rating of perceived exertion. Understanding the above phenomena physiologically is problem...

Detection of the irradiation dose and the vigour of irradiated rice based on the ultra-weak luminescent analysis is one of the promising analytical detection methods. Rough rice and head rice flour were used in this research for ultra-weak luminescent analysis. The bioluminescence intensity of the rough rice was different at varying irradiation doses and storage time. The trend of the differenc...