Sensitivity of Leaf Type of Soybean (Glycine max L.) to Photoperiodic Induction

Abstract

The presented research focused to examine the Sensitivity of Leaf type of Soybean (Glycine max L.) to Photoperiodic Induction. The study was conducted at the Upper Sanraymundo Shiek Mustafa compound, Jolo, Sulu Philippines from May 19, 2024 to June 6, 2024. Table 1 shows the number of days to flowering and node position of the first flower of soybeans (Glycine max). Results revealed that sensitivity of different leaf type to photoperiodic induction significantly affected the number of days to flowering of soybeans. Cotyledonary stage (T1) significantly prolonged the days to flowering for 16 days. Meanwhile comparable effects were observed on unifoliate stage (T2), first trifoliate leaf stage (T3) and intact plant with no removal of foliage (T4) which floral induction were exhibited on (11, 12.33 and 10.33 days).

This study was conducted to determine the sensitivity of the different leaf types of soybeans to photoperiodic induction in terms of: Number of days to flowering, Node position of the first flower, Number of flowering nodes, Number of flowers per plants and Percent fruit set. This study was limited in determining whether sensitivity of the different leaf types to photoperiodic induction significantly affects the flower induction of soybeans.

This study was made through the Analysis of variance (ANOVA) and treatment mean comparison by the Least Significant Difference (LSD) was performed using STAR (Statistical Tool for Agricultural Research) program.

The findings showed for T1 is shown in Table 1 shows the number of days to flowering and node position of the first flower of soybeans (Glycine max). Results revealed that sensitivity of different leaf type to photoperiodic induction significantly affected the number of days to flowering of soybeans. Cotyledonary stage (T1) significantly prolonged the days to flowering for 16 days.

The findings showed for T2 is shown in Table 2. Number of flowers as influenced by sensitivity of different leaf types of soybeans (Glycine max L.) to photoperiod induction (May 19-June 6, 2024).  Results demonstrated significant difference on the 2nd, 3rd, 4th. 5th and 6th data gathering on the number of flowers in soybeans as affected by different sensitivity of leaf type on photoperiodic induction. Treatment 4 (intact plant with no removal of foliage) significantly produce the highest number of flowers in soybean which were comparable with treatment 2 (unifoliate stage) and the control.

The findings showed for T3 is shown in Table 3 showed the number of flowering nodes of soybean (starting from May 19- June 6, 2024). Results indicated that number of flowering nodes of soybean in the 3rd and 4th gathering was significantly affected by the sensitivity of different leaf type on photoperiodic induction. Treatment 4 (intact plant with no removal of foliage) significantly produced the highest number of flowering nodes which were comparable with Treatment 2 and the control.

The findings showed for T4 is shown in Table 4 shows the percent fruit set of soybean. Results revealed that sensitivity of different leaf type on photoperiodic induction significantly affects the percent fruit set of soybean. Control obtained the highest percentage of fruit setting which were comparable with Treatment 4,2 and 3).

Results suggested that removal of the soybean leaves subjected to 10 hours’ photoperiodic induction had significantly affected horticultural characteristics of soybeans. Further studies should be conducted to validate the results.