Abstract
Microscopic observations of floral organs were needed to clarify the determining process of soybean yield. As previous studies have classified the development of floral organs into many stages, we tried to provide a simple classification by dividing the development into 9 stages through referencing the appearance and formation of organs, pre-differentiation (I), floral differentiation (II), bract formation (III), petal formation (IV), stamen formation (V), pistil formation (VI), ovule-anther formation (VII), pollen-embryo sac formation (VIII), and flowering (IX). The floral organs were differentiated at the same time on different nodes of the stem irrespective of the vegetative leaf growth on each node. In a node, the floral organs were differentiated from the 1st to the 2nd and 3rd order raceme. Within a plant, the floral organs were differentiated at first on the axil of the main stem accompanied by primary branches at the 4th-10th nodes from the base (2nd order raceme). As the subsequent progress of developmental stage was delayed or rested, flowering within a plant progressed according to raceme order, from the 1st to the 2nd and 3rd order raceme. The floral differentiation of the terminal and the 1st (basal) raceme, and 2nd and 3rd (upper) racemes were observed before the beginning of the flowering period. In spite of the basal raceme developing rapidly at the same time, the upper raceme was differentiated and developed separately among nodes for a long time. In conclusion, the number of floral organs on the basal raceme were determined before the beginning of the flowering period and that on the upper raceme during the flowering period.
| Original language | English |
|---|---|
| Pages (from-to) | 85-90 |
| Number of pages | 6 |
| Journal | Japanese Journal of Crop Science |
| Volume | 67 |
| Issue number | 1 |
| Publication status | Published - Mar 1998 |
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Keywords
- Developmental stage of floral organ
- Floral differentiation
- Light microscope
- Morphogenesis
- Number of flowering buds
- Raceme order
- Soybean
ASJC Scopus subject areas
- Agronomy and Crop Science
Cite this
Differentiation and developmental stages of floral organs as influenced by nodal position on the stem and raceme order in a determinate type of soybean. / Saito, Kuniyuki; Isobe, Sachiko; Kuroda, Toshiro.
In: Japanese Journal of Crop Science, Vol. 67, No. 1, 03.1998, p. 85-90.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Differentiation and developmental stages of floral organs as influenced by nodal position on the stem and raceme order in a determinate type of soybean
AU - Saito, Kuniyuki
AU - Isobe, Sachiko
AU - Kuroda, Toshiro
PY - 1998/3
Y1 - 1998/3
N2 - Microscopic observations of floral organs were needed to clarify the determining process of soybean yield. As previous studies have classified the development of floral organs into many stages, we tried to provide a simple classification by dividing the development into 9 stages through referencing the appearance and formation of organs, pre-differentiation (I), floral differentiation (II), bract formation (III), petal formation (IV), stamen formation (V), pistil formation (VI), ovule-anther formation (VII), pollen-embryo sac formation (VIII), and flowering (IX). The floral organs were differentiated at the same time on different nodes of the stem irrespective of the vegetative leaf growth on each node. In a node, the floral organs were differentiated from the 1st to the 2nd and 3rd order raceme. Within a plant, the floral organs were differentiated at first on the axil of the main stem accompanied by primary branches at the 4th-10th nodes from the base (2nd order raceme). As the subsequent progress of developmental stage was delayed or rested, flowering within a plant progressed according to raceme order, from the 1st to the 2nd and 3rd order raceme. The floral differentiation of the terminal and the 1st (basal) raceme, and 2nd and 3rd (upper) racemes were observed before the beginning of the flowering period. In spite of the basal raceme developing rapidly at the same time, the upper raceme was differentiated and developed separately among nodes for a long time. In conclusion, the number of floral organs on the basal raceme were determined before the beginning of the flowering period and that on the upper raceme during the flowering period.
AB - Microscopic observations of floral organs were needed to clarify the determining process of soybean yield. As previous studies have classified the development of floral organs into many stages, we tried to provide a simple classification by dividing the development into 9 stages through referencing the appearance and formation of organs, pre-differentiation (I), floral differentiation (II), bract formation (III), petal formation (IV), stamen formation (V), pistil formation (VI), ovule-anther formation (VII), pollen-embryo sac formation (VIII), and flowering (IX). The floral organs were differentiated at the same time on different nodes of the stem irrespective of the vegetative leaf growth on each node. In a node, the floral organs were differentiated from the 1st to the 2nd and 3rd order raceme. Within a plant, the floral organs were differentiated at first on the axil of the main stem accompanied by primary branches at the 4th-10th nodes from the base (2nd order raceme). As the subsequent progress of developmental stage was delayed or rested, flowering within a plant progressed according to raceme order, from the 1st to the 2nd and 3rd order raceme. The floral differentiation of the terminal and the 1st (basal) raceme, and 2nd and 3rd (upper) racemes were observed before the beginning of the flowering period. In spite of the basal raceme developing rapidly at the same time, the upper raceme was differentiated and developed separately among nodes for a long time. In conclusion, the number of floral organs on the basal raceme were determined before the beginning of the flowering period and that on the upper raceme during the flowering period.
KW - Developmental stage of floral organ
KW - Floral differentiation
KW - Light microscope
KW - Morphogenesis
KW - Number of flowering buds
KW - Raceme order
KW - Soybean
UR - http://www.scopus.com/inward/record.url?scp=0031917548&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031917548&partnerID=8YFLogxK
M3 - Article
VL - 67
SP - 85
EP - 90
JO - Japanese Journal of Crop Science
JF - Japanese Journal of Crop Science
SN - 1349-0990
IS - 1
ER -