Differentiation and developmental stages of floral organs as influenced by nodal position on the stem and raceme order in a determinate type of soybean

Kuniyuki Saito, Sachiko Isobe, Toshiro Kuroda

Research output: Contribution to journalArticle

4 Citations (Scopus)

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 languageEnglish
Pages (from-to)85-90
Number of pages6
JournalJapanese Journal of Crop Science
Volume67
Issue number1
Publication statusPublished - Mar 1998

Fingerprint

Soybeans
developmental stages
soybeans
Ovule
flowering
stems
Pollen
Embryonic Structures
Growth
stem nodes
embryo sac
pistil
bracts
stamens
ovules
branches
anthers
corolla
inflorescences
pollen

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

@article{fd73b64e70714c65ba70bc8b33eb47b8,
title = "Differentiation and developmental stages of floral organs as influenced by nodal position on the stem and raceme order in a determinate type of soybean",
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.",
keywords = "Developmental stage of floral organ, Floral differentiation, Light microscope, Morphogenesis, Number of flowering buds, Raceme order, Soybean",
author = "Kuniyuki Saito and Sachiko Isobe and Toshiro Kuroda",
year = "1998",
month = "3",
language = "English",
volume = "67",
pages = "85--90",
journal = "Japanese Journal of Crop Science",
issn = "1349-0990",
publisher = "Crop Science Society of Japan",
number = "1",

}

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 -