Iranian Journal of Seed Science and Technology

Evaluation the effects of mother plant planting date and density on germination and vigor of soybean seed

H. Sadeghi; H Heidari Sharifabad; A. Hamidi; Gh. Nourmohammadi; H. Madani

Volume 6, Issue 1 , June 2017, , Pages 219-233

https://doi.org/10.22034/ijsst.2017.113941

Abstract

High temperature during seed set and seed filling can reduce yield and seed quality. In order to evaluate the effect of high temperature during planting date and also plant density on soybean seed quality, an experiment was conducted at two locations, namely, Seed and Plant Certification and Registration ... Read More

Effect of drought stress and potassium foliar application on seed yield and seed germination characteristics of three wheat (Triticum aestivum L.) cultivars.

Volume 3, Issue 1 , March 2014, , Pages 67-83

Abstract

In order to evaluate the effect of drought stress and potassium foliar application on seed yield and seed germination characteristics of three wheat (Triticum aestivum L.) cultivars, an experiment was conducted in 2011-2012 at two locates, 1. Seed and Plant Certification and Registration Research Institute ... Read More In order to evaluate the effect of drought stress and potassium foliar application on seed yield and seed germination characteristics of three wheat (Triticum aestivum L.) cultivars, an experiment was conducted in 2011-2012 at two locates, 1. Seed and Plant Certification and Registration Research Institute (SPCRI), Karaj- Iran 2. Agricultural and Natural Resources Research Center of Yazd-Iran. The experiment was carried out using a split plot factorial based on a randomized complete blocks design with three replications. The water treatments included three irrigation regimes; normal, mild stress (warer withhold at the grain filling phase) and severe stress (water withhold at the ear emergence phase); potassium foliar treatments included, 0, 1.5% and 3.0% K2O applications and three wheat cultivars (Marvdasht, Pishtaz and WS-82-9). Result showed that reaction of cultivars at two locates for seed yield was different under drought stress conditions. High and lowseed yield were producedwith WS-82-9 at Karaj under normal water use (9310 kg ha-1)and with Marvdasht cultivar at Yazd under sever drought stress (2220 kg ha-1), respectively. Seed weight and seed yieldshowed significantdecreases by increasing drought stress. The mentioned traits showed significantincreases by spraying of K2O and it was more at Yazd area under severe drought stress, because of more unfavorable condition. Spraying wheat plants with 3.0%K2O produced the highest value of seed yield (7321.9 kg ha-1); while control treatment (without potassium foliar application) at Yazd gave the lowest value of this character. Significant interaction of location× drought stress× cultivar on seed wastes showed that reaction of cultivars at two places was different under drought stress conditions, so that minimum and maximum seed wastes were observedin WS-82-9 at Karaj under normal irrigation (%2.26)and in Marvdasht cultivar at Yazd under severe drought stress (%54.76), respectively.Results revealed that high and lowseed wastes were observedunder no application of potassium (22.14%)and withspraying 3.0 % K2O (13.99%), respectively. Seed germination percentage before and after seed cleaning showed that seed cleaning had important role on improvement of seed quality, in a way that drought stress had significant influence on seed germination percentage before seed cleaning, but drought stress had no significant influence on seed germination percentage and mean germination time after seed cleaning.

Effect of seed size on some germination characteristics of three bread wheat (Triticum aestivumL.) cultivars

Volume 1, Issue 1 , March 2012, , Pages 19-27

Abstract

Among the production factors, seed as the primary production factor plays an important role in the transfer and exploitation of genetic characteristics seeds aiming to increase qualitative and quantities of the yield. Among growth stages of plants, seed germination and emergence stages are the most critical ... Read More Among the production factors, seed as the primary production factor plays an important role in the transfer and exploitation of genetic characteristics seeds aiming to increase qualitative and quantities of the yield. Among growth stages of plants, seed germination and emergence stages are the most critical growth stages and play a pivotal role in plant establishment in fields. In order to investigate the impacts of seed diameter size on characteristics of germination in three wheat )Triticum aestivum L.( cultivars, this study was conducted in 2008 in a research station of seed and plant certification and registration research institute, Karaj, Iran. The experimental factors were five seed diameters ) 2-2.2, 2.2-2.5, 2.5-2.8, 2.8-3 ,andgt;3 mm ( and three wheat cultivars )Mahdavi, Pishtaz and Bahar(. In laboratory, seeds from different size class from cultivars were planted in a completely randomized design with 3 replicates. Germination percentage, germination speed , seedling-length, radicle-length, plumule-length, seedling dry weights, radicle dry weights and plumule dry weights were measured. Data analysis showed that seed size had a significant impact on speed of germinations, radicle dry weights, plumule dry weights and seedling dry weights. Results indicated that germination speed significantly decrease with increasing seed size. The other traits showed significant increases with increasing seed size. Cultivar had significant impact on germination characteristics but germination percentage and germination speed were similar between cultivars. Mahdavi cultivarandrsquo;s seedling length and dry weight was dependent on 1000 number of seed weights, especially influenced by 2.5-2.8, 2.8-3 and andgt;3 mm seed diameter, Seed size may be equivalent to the amount of nutrients saved in seeds. Therefore larger seeds may produce vigorous seedlings. Significant interaction was observed for radicle-length, plumule-length and seedling dry weight. This study suggested that the wheat genotypes did not have similar performance regarding to the variation in seed sizes .

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Author = Heidari Sharifabad, H

Evaluation the effects of mother plant planting date and density on germination and vigor of soybean seed

Abstract

Effect of drought stress and potassium foliar application on seed yield and seed germination characteristics of three wheat (Triticum aestivum L.) cultivars.

Abstract

Effect of seed size on some germination characteristics of three bread wheat (Triticum aestivumL.) cultivars

Abstract