Open AccessOptimal temperature for germination and seedling development of cowpea seeds
Author(s) -
Juliane Rafaele Alves Barros,
Francislene Angelotti,
Jéssica de Oliveira Santos,
Rodrigo Moura e Silva,
B. F. Dantas,
Natoniel Franklin de Melo
Publication year - 2020
Publication title -
revista colombiana de ciencias hortícolas/revista colombiana de ciencias hortícolas
Language(s) - English
Resource type - Journals
eISSN - 2422-3719
pISSN - 2011-2173
DOI - 10.17584/rcch.2020v14i2.10339
Subject(s) - germination , seedling , cultivar , photoperiodism , biology , agronomy , horticulture
Temperature is one of the climatic elements that affect most the germination process and seedling development. Thus, the objective of this study was to evaluate the germination and seedling development of cowpea cultivars under increasing temperature. The seeds of the cultivars Acauã, Carijó, Guariba, Gurguéia, Itaim, Juruá, Pajeú, Potengi, Pujante, Rouxinol, Tapahium, and Tumucumaque were kept in germination chamber at temperatures of 20, 25, 30, 35 and 40°C, with photoperiod of 12 h. Cowpea seeds have optimal germination performance and seedling development at temperatures in the range of 30.49 - 35.48°C. The cultivars presented germination percentage above 91% under 40°C, however, the seedling were abnormal. The temperature of 20°C provided germination above 96%, but with a longer period to germinate. The temperature range between 30 - 35°C favored the germination speed index, average time, and seed germination speed, with optimum temperatures varying between the cultivars. The highest rate of normal seedlings was observed at temperatures between 25 and 35°C.