Physiological Quality of Pigeonpea Seed after Application of Desiccant Herbicides

作     者：Raniele Tadeu Guimaraes Itamar Rosa Teixeira André José Campos Gisele Carneiro da Silva Ivano Alessandro Devilla Alessandro Guerra da Silva Paulo César Timossi 

作者机构：Department of Agricultural EngineeringSate University of GoiásAnápolísBrazil Department of AgriculturalUniversity of Rio VerdeRio VerdeBrazil Department of AgriculturalFederal University of GoiásJataíBrazil 

出 版 物：《American Journal of Plant Sciences》 (美国植物学期刊（英文）)

年 卷 期：2015年第6卷第6期

页      面：826-832页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

基　　金：To the Foundation for Support of Higher Education—CAPES the partial funding of research and the receive of the scholarship to the first author The National Council for Scientific and Technological Development—CNPq the receive of productivity in research grants to the second and sixth author 

主　　题：Cajanus cajan(L.)Millsp. Pre-Harvest Desiccation Deterioration Maturity Vigor 

摘      要：The pre-harvest application of herbicides may impair seed quality. This way, this paper was conducted to evaluate the effects of the application of desiccant herbicides on the physiological quality of pigeonpea seeds. Six batches of seeds from plants desiccated with glyphosate were evaluated at doses: 1.125 (B1), 1.5 (B2) and 1.875 L·ha-1 (B3);and Gramocil (20% Paraquat + 10% Diurom) at doses: 1.5 (B4) and 2 L·ha-1 (B5), and a control which received no application (B6). Seed viability was assessed through the germination standard test, and vigor through the first germination count, accelerated aging, electrical conductivity, seedling length, seedling dry matter and biomass density tests. The experimental design was the completely randomized, with four replications. Data were submitted to variance analysis, and when significant effects were observed, the Scott- Knott test was carried out at 5% probability using the SISVAR 5.1 software. The results showed that: a) the application of 1.875 L·ha-1 of glyphosate was harmful to pigeonpea seed viability and vigor, evaluated through the accelerated aging test;b) applications of glyphosate in a 1.875 L·ha-1 dose and Gramocil in 2 L·ha-1 resulted in low vigor according to the electrical conductivity test of seeds;and c) the seed vigor measured by the first count, seedling length, seedling dry matter and biomass density test was not influenced by the type of desiccant applied.