Genotypic and Environmental Variation of Lag Period of Pod Growth in Soybean

Photoperiod sensing of leaf regulates pod setting in soybean (Glycine max (L.) Merr.)

“…To confirm the relationship between day length and pod setting, we examined the effect of short-day treatment after flowering on the pod setting of 'Fukuyutaka'. All photoperiod treatments (2-11 short days) significantly promoted pod setting (Figure 1), in agreement with a previous report (Zheng et al, 2003); the effect gradually increased with the duration of short-day treatment. In 2and 4-day short-day treatments, the period from flowering to pod setting was 4 or 5 days shorter than in control.…”

“…Recently, we reported that pod setting rate in soybean is regulated by vegetative growth after flowering through gibberellic acid biosynthesis (Taniguchi et al, 2018). Soybean is a short-day plant and is highly sensitive to photoperiod; its flowering is promoted by short-day conditions, and the period from flowering to pod setting is also shorter under short-day conditions than under natural conditions (Zheng, Maeda & Fukuyama, 2003). In other plants, pod setting of bambara groundnut (Vigna subterranea (L.) Verdec.)…”

Pod Dehiscence in Relation to Pod Position and Moisture Content in Soybean

“…The vegetative activity decreases during the initiation of infl orescence in the determinate type but it continues in the indeterminate type. Although the determinate type performs shorter in fl owering period than the indeterminate type (Yoshida et al, 1983;Gai et al, 1984;Foley et al, 1986;Zheng et al, 2003;Egli, 2005), its fl owering period is longer than 20 days (Hansen and Shibles, 1978;Gai et al, 1984;Umezaki et al, 1988;Yokoyama et al, 1989;Dybing, 1994). The length of fl owering period affects the variation in the pod maturity and moisture content in the plant.…”

Approach of monocarpic senescence control by nitrogen manipulation in mungbean and cowpea

“…A several studies documented that the pod growth was very slow after flowering in soybean. Zheng et al (2003) found the lag period of pod growth was much longer in the flowers that opened early. Saitoh et al, (1998a) indicated that the rate of pod growth was slower in the low order raceme (early opening flowers) than that in the high order racemes (late opening flowers).…”

“…It makes the competition for assimilate between vegetative organs and reproductive sink, therefore, caused some flowers abortion. On the other hand, the pod growth in early flowers is slower than that of late flowers (Saitoh et al, 1998b;Zheng et al, 2003), indicating that a regulation system for the uniform pod growth and maturation exists in the plant. However, a little information is known about mungbean and cowpea.…”