Genome size and guard cell length are associated in four species of Miconia (Miconieae, Melastomataceae)

IF 1.4 4区 生物学 Q3 PLANT SCIENCES
Juliana K. Ziemmer, Patrícia Sperotto, Leila N. Vieira, Hugo P. F. Fraga, Erika Amano, Marcelo Reginato, Renato Goldenberg
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Abstract

Miconia Ruiz & Pav. (Melastomataceae) is the seventh largest genus of flowering plants, but despite the great diversity of species (ca. 1900), no genome size (GS) studies have been published on the group. Studies have shown that GS can strongly predict phenotypic characteristics such as guard cell length, stomatal density, and epidermal cell area. As more genome sizes become available, a more comprehensive understanding of the role that GS variation plays in cellular characteristics emerges. Here, for the first time, we estimate GS by flow cytometry in four Miconia species, Miconia australis (Cham.) R. Goldenb., Miconia hyemalis St. Hil. & Naud. ex Naud., Miconia sellowiana (DC.) Naudin, and Miconia nianga (DC.) R.Goldenb.). Subsequently, we carried out a comparative analysis of the relationship between GS and three phenotypic characteristics: guard cell length, stomatal density, and epidermal cell area. The estimated GS ranged from 0.56 to 1.2 pg, and this variation may be attributed to the distinct reproductive modes among the species analyzed. We found a strong positive correlation between GS and guard cell length (r2 = 0.92) and a low correlation in stomatal density and epidermal cell area (r2 = 0.07 and 0.06, respectively). In this pioneering study, we provide some conclusions or speculations, and point to new questions yet to be explored in Miconia.

Abstract Image

4种Miconia (Miconieae, Melastomataceae)基因组大小和保卫细胞长度的相关性研究
Miconia Ruiz &;奶油水果蛋白饼。(Melastomataceae)是开花植物的第七大属,但尽管物种多样性很大(约1900年),尚未发表关于该组的基因组大小(GS)研究。研究表明,GS可以很好地预测保护细胞长度、气孔密度和表皮细胞面积等表型特征。随着更多基因组大小的可用性,对GS变异在细胞特征中所起作用的更全面的理解出现了。本研究首次利用流式细胞术对4种Miconia (Miconia australis, Cham;r . Goldenb。圣希尔薇根草;,Naud。Naud交货。紫薇花(华盛顿)Naudin和Miconia nianga (DC.)R.Goldenb)。随后,我们比较分析了GS与保护细胞长度、气孔密度和表皮细胞面积三个表型特征之间的关系。估计的GS值在0.56 ~ 1.2 pg之间,这种差异可能归因于所分析物种之间不同的生殖模式。结果表明,GS与保卫细胞长度呈正相关(r2 = 0.92),与气孔密度和表皮细胞面积呈低相关(r2分别为0.07和0.06)。在这项开创性的研究中,我们提供了一些结论或推测,并指出了Miconia有待探索的新问题。
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来源期刊
Brazilian Journal of Botany
Brazilian Journal of Botany Agricultural and Biological Sciences-Plant Science
CiteScore
3.00
自引率
12.50%
发文量
72
期刊介绍: The Brazilian Journal of Botany is an international journal devoted to publishing a wide-range of research in plant sciences: biogeography, cytogenetics, ecology, economic botany, physiology and biochemistry, morphology and anatomy, molecular biology and diversity phycology, mycology, palynology, and systematics and phylogeny. The journal considers for publications original articles, short communications, reviews, and letters to the editor. Manuscripts describing new taxa based on morphological data only are suitable for submission; however information from multiple sources, such as ultrastructure, phytochemistry and molecular evidence are desirable. Floristic inventories and checklists should include new and relevant information on other aspects, such as conservation strategies and biogeographic patterns. The journal does not consider for publication submissions dealing exclusively with methods and protocols (including micropropagation) and biological activity of extracts with no detailed chemical analysis.
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