Lathyrus macrorhizus: influence des facteurs stationnels sur la floraison in situ

Abstract

Flowering in Lathyrus macrorhizus takes place the whole year round, irrespective of photoperiod. Minimum flower production often occurs at the end of a spell of continuously decreasing air temperatures and is always preceded by a heavy rain period; the length of time following the end of this period is inversely proportional to air temperature. Maximum flower production often occurs at the end of a spell of continuously increasing air temperatures and is always preceded by a period of drought. It is suggested that flowering cycles correspond with cycles of metabolic activity in tubers, depending on respiratory gas exchanges and on temperatures. [Journal translation]