植物种子克服休眠的研究可爱的前女友克拉特

IF 1.1 Q3 HORTICULTURE
Thiago Roberto Rezende Borges, Maurecilne Lemes da Silva, G. Silva, D. I. Rocha
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引用次数: 0

摘要

摘要:双色Dietes的精生繁殖可能受到生理和/或形态生理休眠的阻碍。目的是分析不同方法克服双色天葵种子休眠的效果,以确定该物种可能的发芽前处理方法。进行了两项试验:(1)物理休眠打破评价,其中机械划伤处理采用100号砂纸进行;用硫酸(H2SO4)化学刻蚀5和10分钟,热水(70ºC)浸泡5和10分钟,也进行了评估。完整的种子作为对照。(二)形态生理休眠评价,采用高温(20 ~ 35℃)和低温(9℃)分层组合处理,分0、1、2周进行,共9个处理。在两个试验中,采用随机区组设计测定发芽率(G)、发芽速度指数(GSI)和首次计数(FC),并采用1%的Scott-Knott检验和5%的Dunnett检验进行评价。H2SO4处理10分钟萌发率为42%,GSI为0.52,FC为18%,但只有FC与对照有显著差异。在第二次试验中,与对照(G = 22%)相比,仅在高温(20-35ºC)下度过两周的处理显示出最高的发芽率(30%)。这些结果为了解双色花的萌发生理学提供了相关信息,并有助于优化这一重要观赏植物的萌发前措施。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Overcoming dormancy in seeds of Dietes bicolor (Steud.) Sweet ex Klatt
Abstract Seminiferous propagation of Dietes bicolor is hindered by the probable physical and/or morphophysiological dormancy. The objective was to analyze the efficacy of different methods of overcoming dormancy in D. bicolor seeds to determine a possible pre-germination treatment for the species. Two experiments were conducted: (I) Evaluation of the breaking of physical dormancy, in which the treatments of mechanical scarification were carried using sandpaper #100; chemical scarification with sulfuric acid (H2SO4) for 5 and 10 minutes and immersion in hot water (70 ºC), also, for 5 and 10 minutes, were evaluated. The intact seed was considered a control. (II) Evaluation of morphophysiological dormancy, in which the seeds were submitted to combined treatments of stratification of hot temperature (20-35 °C) and/or cold temperature (9 ºC), distributed in periods of 0, 1, and 2 weeks, totalizing 9 treatments. In both experiments, germination percentage (G), germination speed index (GSI), and first count (FC) were determined, using a randomized block design, and evaluated by the Scott-Knott test at 1% and Dunnett’s test at 5%. The use of H2SO4 10 minutes induced 42% germination, 0.52 GSI, and 18% FC, but only FC was significantly different from the control. In the second trial, the treatment that spent only two weeks in hot temperatures (20-35 ºC) showed the highest germination (30%), compared to the control (G = 22%). These results provide relevant information for understanding the physiology of D. bicolor germination, in addition to contributing to the optimization of pre-germination practices for this important ornamental species.
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来源期刊
Ornamental Horticulture
Ornamental Horticulture Agricultural and Biological Sciences-Horticulture
CiteScore
2.20
自引率
14.30%
发文量
30
审稿时长
50 weeks
期刊介绍: The Journal ORNAMENTAL HORTICULTURE - OH (Revista Brasileira de Horticultura Ornamental) is an official publication of the Brazilian Society for Floriculture and Ornamental Plants (Sociedade Brasileira de Floricultura e Plantas Ornamentais) - SBFPO Short title of the journal: ORNAM. HORTIC. This Journal aim to publish technical and scientific researches in floriculture, ornamental plants, landscaping and landscapes from members of this Society and others. The manuscripts can be submitted in portuguese, but publication must be in English language (U.S.). All the manuscripts submitted to Ornamental Horticulture (Revista Brasileira de Horticultura Ornamental) - OH must not have been submitted or published at the same time, partial or totally, to other journal. It is allowed to read, download, copy, distribute, print, search, or link to parts or the full texts to use them for any other lawful purpose. The reproduction of articles published in this journal is authorized, under the condition that the source is acknowledged.
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