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Author Sakaguchi J, Fukuda H.
Title Cell differentiation in the longitudinal veins and formation of commissural veins in rice (Oryza sativa) and maize (Zea mays).
Vascular development is a central theme in plant science. However, little is known about the mechanism of vascular development in monocotyledons (compared with dicotyledons). Therefore, we investigated sequential processes of differentiation into various different vascular cells by carrying out detailed observations using serial sections of the bases of developing leaves of rice and maize. The developmental process of the longitudinal vascular bundles was divided into six stages in rice and five stages in maize. The initiation of differentiation into procambial progenitor cells forming the commissural vein arose in a circular layer cell that was adjacent to both a metaxylem vessel and one or a few phloem cells in stage V longitudinal vascular bundles. In most cases the differentiation of ground meristem cells into procambial progenitor cells extended in one direction, toward the next longitudinal vascular bundle, and subsequent periclinal divisions and further differentiation produced a vessel element, two companion cells and a sieve element to form a commissural vein. These results suggest the presence of an intercellular signal(s) that induces differentiation of the circular layer cell and the ground meristem cells into procambial progenitor cells, forming a commissural vein sequentially.
Journal J Plant Res.
Volume 121(6)
Pages 593-602
Year 2008
PubMed ID 18932023
PubMed Central ID -
DOI 10.1007/s10265-008-0189-1
Gene -
Strain Wild Core Collection -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
Stages in Each Organ
- Muant Lines (Gene)
Cultivated Varieties(NIG Collection) -
Stages in Each Organ vascular bundle(large vascular bundle) - LV1 - Establishment of procambium
vascular bundle(large vascular bundle) - LV2 - Establishment of protoxylem and phloem tissue
vascular bundle(large vascular bundle) - LV3 - Differentiation of secondary protoxylem
vascular bundle(large vascular bundle) - LV4 - Establishment of metaxylems
vascular bundle(large vascular bundle) - LV5 - Differentiation of vascular bundle sheath
vascular bundle(large vascular bundle) - LV6 - Maturation