Fenologia, morfologia e análise de sementes deCordia trichotoma(Vell.) Arráb. ex Steud.

Ciencia Florestal

Marciele Felippi¹ 

[1] UFSM

关键词: louro-pardo;    germinação;    plântula;    muda;   

DOI  :  10.5902/198050986629

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Pesquisas Florestais

【 摘 要 】

http://dx.doi.org/10.5902/198050986629 On this paper, the phenology and morphology as well as tests were carried out with physical and physiological seedsCordia trichotoma(Vell.) Arrab. ex Steud (blonde). The collection of botanical material and phenological observations were performed on five selected trees located in Frederico Westphalen, Rio Grande do Sul state, from March 2007 to March 2010. The work was conducted under laboratory and greenhouse conditions at the Universidade Federal de Santa Maria, Rio Grande do Sul state. For three years, the bloom was most intense from March to April and the fruiting from May to June. The species has inflorescence, paniculate, consisting of small white colored and hermaphrodite flowers. The fruit is simple, drupaceous, terminated by the corolla tube and by the persistent calyx. The seed is cylindrical, ellipsoidal, pale brown exalbuminous, cotyledonary embryo with baseline, and invaginated plicate cotyledons, trapped around the root hypocotyl axis. The germination is epigeal and the seedling phanerocotyledonal. Seeds are recalcitrant and the average number was 24,591 per kilogram, the seed moisture content was 51%, the germination was 40% and the emergence was 29%. The germination index is oscillating comparing the results of this paper to others, probably due to seed quality, which varies according to each parent tree and its micro-habitat. Therefore, there is importance in the selection of individuals, noticing the features that will bring genetic and physiological representation of the species, thus increasing the homogeneity of the seed lot.

【 授权许可】

CC BY-NC