Intraraceme Variation in the Numbers of Flowers and Pod Set in Field-Grown Soybean.

Saitoh, Kuniyuki; Isobe, Sachiko; Kuroda, Toshiro

doi:10.1626/jcs.68.396

Cited by 9 publications

(6 citation statements)

References 7 publications

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“…Saitoh et al (1999) reported that delayed fl owering at the fl owering stage resulted in reduced pod setting due to the competition for assimilates between the vegetative and reproductive stages of growth. However, in this experiment, top dressing was applied 10 d after flowering.…”

Section: Discussionmentioning

confidence: 99%

Influence of Sowing Time and Nitrogen Topdressing at the Flowering Stage on the Yield and Pod Character of Green Soybean (Glycine max (L.) Merrill)

Nishioka

Okumura

2008

Plant Production Science

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Section: Discussionmentioning

confidence: 99%

Influence of Sowing Time and Nitrogen Topdressing at the Flowering Stage on the Yield and Pod Character of Green Soybean (Glycine max (L.) Merrill)

Nishioka

Okumura

2008

Plant Production Science

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“…Since the magnitude of fl ower abortion varies with the position within plants and racemes (Hansen and Shibles, 1978;Wiebold et al, 1981;Heindl and Brun, 1984;Gai et al, 1984;Saitoh et al, 1999;Kokubun and Honda, 2000), the effects of cytokinin application might be affected by the position on the plant. Further studies are needed to clarify the environmental and physiological conditions under which the positive effects of cytokinin application on pod number and seed yield are expressed.…”

Section: Discussionmentioning

confidence: 99%

Effects of Source/Sink Ratio and Cytokinin Application on Pod Set in Soybean

Yashima

Kaihatsu

Nakajima

et al. 2005

Plant Production Science

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“…Numerous precedent studies showed two putative factors involved in controlling the abortion: availability of photosynthate or nutrients for pod development (Brevedan et al, 1978;Antos and Wiebold, 1984;Brun and Betts, 1984;Heitholt et al, 1986a, b) and availability of certain hormones (Huff and Dybing, 1980;Heindl et al, 1982;Spollen et al, 1986a, b;Carlson et al, 1987;Yarrow et al, 1988;Kokubun and Honda, 2000;Yashima et al, 2005). Within individual racemes, the pod set percentage of basal flowers is considerably higher than that of distal ones (Wiebold et al, 1981;Spollen et al, 1986a;Saitoh et al, 1999): this phenomenon appeared to be associated with the endogenous cytokinin content of flowers; the basal flowers contained a higher percentage of cytokinin than the distal flowers (Kokubun and Honda, 2000). Numerous studies showed the promotive effects of cytokinin (BA, 6-benzylaminopurine) applied to racemes on the pod formation (Crosby et al, 1981;Dyer et al, 1987;Peterson et al, 1990;Mosjidis et al, 1993;Nagel et al, 2001;Yashima et al, 2005), suggesting that cytokinin plays an important role in increasing pod number in soybean.…”

mentioning

confidence: 99%

Roles of Auxin and Cytokinin in Soybean Pod Setting

Nonokawa

Kokubun

Nakajima

et al. 2007

Plant Production Science

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: Soybean plants differentiate abundant floral buds, but most of them fail to grow pods and abort during development. Many studies indicated promotive effects of exogenously applied cytokinin on pod setting, but the effects of auxin application on pod set are ambiguous. In this study, we examined the changes in the concentrations of endogenous auxin and cytokinin in racemes and the effects of application of the two hormones on pod setting to clarify the role of auxin and cytokinin in soybean pod setting. The longraceme soybean genotype IX93-100 was grown in pots and in the field. The auxin (IAA, indoleacetic acid) concentration in racemes was high for a long period from pre-anthesis to 9 days after anthesis (DAA) of the first flower on a raceme, but the cytokinin concentration was high for a short period, with a peak at 9 DAA. The IAA concentration was higher in distal portions of racemes, but the cytokinin concentration was higher in basal portions of racemes. In pot-grown plants, IAA applied to racemes tended to reduce the number of flowers and pods. In contrast, 6-benzylaminopurine (BA) applied to racemes before anthesis tended to reduce the number of flowers and pods, and that applied around 7 DAA significantly increased the pod-set percentage. However, these effects of IAA and BA application were slight in field-grown plants. These results indicate that the concentration of endogenous auxin and cytokinin in racemes changes in a different manner, and that cytokinins have a positive, and auxin a negative effect on pod setting when respective hormones are applied to racemes after the anthesis stage.

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Intraraceme Variation in the Numbers of Flowers and Pod Set in Field-Grown Soybean.

Cited by 9 publications

References 7 publications

Influence of Sowing Time and Nitrogen Topdressing at the Flowering Stage on the Yield and Pod Character of Green Soybean (Glycine max (L.) Merrill)

Influence of Sowing Time and Nitrogen Topdressing at the Flowering Stage on the Yield and Pod Character of Green Soybean (Glycine max (L.) Merrill)

Effects of Source/Sink Ratio and Cytokinin Application on Pod Set in Soybean

Roles of Auxin and Cytokinin in Soybean Pod Setting

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