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Effect of the Growth Promoter VIUSID Agro on the morphophysiological and Productive Performance of Tobacco Growth(Nicotiana tabacum L.)

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Journal of Agricultural Science and Technology(B) 2018年第3期8卷 157-167页

作者： Kolima Pena Juan Carlos Rodríguez Dilier Olivera Alexander Calero Richel Dorta Jorge Meléndrez Yariel Fernando Veloso Bulent Kukurtcu Department of Agronomy Faculty of Agricultural SciencesUniversity of Sancti Spiritus(UNISS)Sancti Spíritus 60100Cuba Department of Vegetable Production School of Agricultural and Veterinarian SciencesState University Paulista(Unesp)Jaboticabal 14870Brazil Department of Production Experimental Station of TobaccoCabaiguan 62410Cuba Scientific Department CatalysisS.L.Madrid 28016Spain

With the objective of evaluating the effect of VIUSID agro on the morphophysiological and productive performance of tobacco seedlings,a randomised block experiment was designed with five treatments and three replications.The variants were:dosage of 0.2,0.5,0.7 and 1.0 L/ha and one control.The variables are recorded at three points of the cultivation cycle 10th,20th and 30th days after planting(DAP).Among the indicators evaluated were the fresh and dry mass of the plants,the leaves per plant,foliar area,the length and diameter of the stalk as well as the characteristics of the root.The rates of physiological growth and agricultural yield were also evaluated.The results showed a significant increase(p≤0.05)in the fresh and dry mass of the plants when VIUSID was used.Regarding the length of the stalk,the average increases of those treated in comparison to the control in the final evaluation were 28.42%,30.51%,41.17%and 38.43%.In terms of the diameter of the stalk and the foliar area in all evaluations,the treatments with VIUSID significantly exceeded the control.The absolute growth rate and net assimilation was significantly higher when the product was used.In the relative growth rate,the most favourable behaviour was the dosage of 0.5 L/ha,in final evaluation.With regard to yield,the best performance with significant differences(p≤0.05)to the other treatments was the dosage of 0.5,0.7 and 1.0 L/ha.Therefore,VIUSID agro had a positive influence on the morphophysiological and productive indicators of the tobacco seedlings.

关键词： VIUSID agro tobacco morphophysiological and productive characteristics

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Efficient, Season-Independent Seed Germination in Black Cohosh (<i>Actaea racemosa</i>L.)

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American Journal of Plant Sciences 2013年第5期4卷 77-83页

作者： Bhavneet Kaur Joe-Ann McCoy Edward Eisenstein Institute for Bioscience and Biotechnology Research Fischell Department of Bioengineering University of Maryland Rockville USA Plant Protection DuPont Agricultural Biotechnology Wilmington USA The North Carolina Arboretum University of North Carolina Affiliate Campus Asheville USA.

Seed germination in black cohosh was systematically examined in eighteen populations including 15 USDA accessions with an effective protocol for the consistent, season independent germination of this valuable alternative specialty crop. Two in vitro approaches were investigated for breaking the complex double dormancy of black cohosh seeds for yearround germination of plants for increased cultivation and laboratory studies. The first approach was a two-step alternating temperature stratification in which surface sterilized seeds were incubated in darkness at 25?C for two weeks followed by incubation at alternating temperatures of 20?C and 8?C for 12-hour periods with a 16-hour photoperiod for 12 months. The second was a three-step-approach that involved initial stratification of seeds in darkness at 25?C for two weeks, followed by incubation at 4?C in darkness for 3 -4 months and then cultivation at 25?C with a 16-hour photoperiod to generate seedlings. Although both approaches broke double dormancy for black cohosh seed germination, the three-step-stratification technique yielded higher percentage seed germination in less time when compared to the two-step scheme, including for seeds stored over two years. Additional factors of critical importance for efficient germination included the selection of healthy and viable seeds, as well as thorough but non-excessive surface sterilization to control bacterial and fungal contamination. The in vitro approach for black cohosh germination allowed year-round cultivation and culture of a number of different genotypic accessions to enable laboratory based studies on cell culture and transformation approaches to aid in deciphering gene-metabolite relationships in this important medicinal plant.

关键词： Actaea racemosa Seed Germination morphophysiological Dormancy Stratification Radicle

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