Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

PHOTOPERIOD AND TEMPERATURE RESPONSE IN THE FLOWERING OF SOYBEAN (Glycine max (L.) Merrill) PLANT: AN OVERVIEW (Pages : 5 - 13)

Soybean (Glycine max (L.) Merrill) is a high-value commercial crop. The demand for soybean has been increasing day by day all over the world. Therefore, it is essential to increase soybean production area and yield for keeping pace with growing demand. Better knowledge about the responses to photoperiod (day length) and temperature on soybean flowering is a key breakthrough to increase production of soybean. Soybean is a photo-sensitive short-day plant that flowers initiate when days are shorter than the maximum critical value and this period varies from genotype to genotype. Earlier findings reported that the sowing time and adaption of soybean to wider ranges of latitude depend on photoperiods. The period from emergence to the flowering of soybean may be divided into three phases: 1) the pre-inductive phase or juvenile growth phase (JGP); 2) the inductive phase; and 3) the post-inductive phase. The photo-sensitivity and JGP give guidance to choose an adaptable genotype for a specific latitude belt. Night break is also responsible for delaying the flowering time of soybean. Alternately, the temperature is also another important factor for soybean production all over the world. Flowering time of soybean is generally affected by temperature regarding days from emergence to first flower open. However, considering accumulated temperatures during emergence to first flower, it could be stated that temperature might affect quantitatively in soybean flowering i.e., the temperature may not have a triggering effect on flowering initiation in soybean. There is a great problem to separate the photoperiod and temperature effect in the field experiment because these two factors changed daily and interact with each other. It is essential to conduct experiments in the control environment to clarify the effect of photoperiod and temperature independently on soybean flowering. The current study made clear the effect of photoperiod and temperature independently on the flowering of soybean. Download