Jornal Global de Biologia, Agricultura e Ciências da Saúde

Abstrato

Study of Some elements of biology of Wild Jujube «Ziziphus lotus (L.) Desf.

Rsaissi N., B. Bencharki & M. Bouhache

This study showed showed that Ziziphus lotus (L.) reproduces vegetatively mainly through horizontal roots and root crown located superficially in the soil. Other modes of dissemination by seedlings from root crown, fragments of root crown, branch cuttings and seeds are possible if soil moisture and the temperature are favorable. The stone is a major obstacle to seed germination. The optimum temperature for germination of jujube seeds is 35 ° C. Increasing the temperature to 40 °C severely affects their germination and viability. The application of gibberellins hormone enhances the effect of temperature on seed germination. This implies the existence of two types of seeds dormancy: physiological and physical. The burial of seeds to a depth of 3cm significantly raised their germination kinetics and reduced their final rates. While seeds burial to 6 cm prevents their emergence. The cutting the roots and root crown and their burial in the ground at depths greater than 10 cm stopped their regeneration. After emergence, the seedlings pass through six stages of development and they acquire the status of perennials.