DETERIORATION, HARDENING AND ABNORMALITIES IN SEEDS AND SEEDLINGS OF UPLAND COTTON (Gossypium hirsutum L. r. latifolium H.) GENOTYPES UNDER WATER sSTRESS

Revista Brasileira de Engenharia Agrícola e Ambiental

Fernandes, Pedro Dantas¹  Pereira, José Rodrigues²  Beltrão, Napoleão Esberard de Macêdo³ 

[1] UFPB, Campina Grande, Brazil;Embrapa, Algodão, Campina Grande, Brazil;Embrapa Algodão, Brazil

关键词:  water potential;    drought simulation;    PEG-6000;    germination;   

DOI  :  10.1590/1807-1929/agriambi.v02n02p186-194

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

With the objective os studying the behavior of germination of the best ten genotypes developed by Embrapa Breeding Program of upland cotton (Gossypium hirsutum L. race latifolium H.) of media fibers, and to identify the more and the less sensitive, in six levels of the osmotic potential (0.0, -0.2, -0.4, -0.6, -0.8 and -1.0MPa), induced by polyethylene glycol-6000, a trial in laboratory was carried out, making use of the Germitest paper, in a experimental design completely randomized, in a 10 x 6 factorial scheme, with 4 replications, each consisting of 50 seeds. There was difference of behavior between the genotypes in study of cotton, between different water stress levels. The percentage of deteriorated seeds and abnormal seedlings, on ten genotypes declined, but the percentage of seeds without absorption of water increased, in the major PEG-6000 concentration levels. The cultivars CNPA Precoce 2 and CNPA Precoce 1 are the less sensitive to reduced osmotic potentials (-0.6 and -0.8MPa), while LG ROGERS and CNPA 7H are more or less sensitive. The lineage CNPA 86-1195-1 is the most sensitive.

【 授权许可】

Unknown