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Floral determination in the terminal bud of the short-day plant Pharbitis nil.

Abstract：

:Temporal and spatial aspects of floral determination in seedling terminal buds of the qualitative short-day plant Pharbitis nil were examined using a grafting assay. Floral determination in the terminal buds of 6-day-old P. nil seedlings is rapid; by 9 hr after the end of a 14-hr inductive dark period more than 50% of the induced terminal buds grafted onto uninduced stock plants produced a full complement of flower buds. When grafted at early times after the end of the dark period the terminal buds of induced plants produced three discrete populations of plants: plants with no flowers, plants with two axillary flowers at nodes 3 and 4 and a vegetative terminal shoot apex, and plants with five to seven flowers including a terminal flower. The temporal relationship among these populations of plants produced by apices grafted at different times indicates that under our conditions, the region of the terminal bud that will form the axillary buds at nodes 3 and 4 becomes florally determined prior to floral determination of the region of the terminal bud giving rise to the nodes above node 4.

journal_name

Dev Biol

journal_title

Developmental biology

authors

Larkin JC,Felsheim R,Das A

doi

10.1016/0012-1606(90)90268-n

subject

Has Abstract

pub_date

1990-02-01 00:00:00

pages

434-43

issue

2

eissn

0012-1606

issn

1095-564X

pii

0012-1606(90)90268-N

journal_volume

137

pub_type

杂志文章

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