e-journal

Expression of floral identity genes in Clianthus maximus during mass inflorescence abortion and floral development

---

Background and Aims Clianthus maximus is a leguminous perennial with an unusual order of floral organ insertion, and inflorescences produced year round that nearly all abort except during a limited time in autumn. This study aimed to determine at what point in floral organ differentiation abortion occurred and whether the expression of the floral identity genes underlies this cessation in flower development.
Methods Inflorescences were harvested across an annual cycle and flower development was examined by light
and scanning electron microscopy. Expression of the C. maximus-equivalents of LEAFY (LFY), APETALA1
(AP1), PISTILLATA (PI) and AGAMOUS (AG) was monitored simultaneously by quantitative, reverse transcriptase PCR.
Key Results Only those inflorescences formed in autumn proceeded to anthesis. Organogenesis had not begun in inflorescences that aborted. The C. maximus-equivalents of AP1, PI and AG were expressed in sepals, petals, carpels and stamens, as expected from the ABC model of floral organ identity specification; furthermore, the order of expression of the three genes reflected the unusual pattern of organ differentiation. Low expression of LFY and AP1 was observed during inflorescence abortion.
Conclusions Predictions of gene expression based on the ABC model were upheld despite the unusual mass
abortion of inflorescences and the non-standard pattern of organ formation. The lack of expression of LFY
and AP1 in inflorescences may have been the cause of inflorescence abortion.
Key words: ABC model, Clianthus maximus, floral development, floral identity genes, gene expression,
inflorescence abortion, LEAFY, APETALA1, PISTILLATA, AGAMOUS, qRT-PCR.

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

Annals of Botany

No. Panggil

-

Penerbit

: Oxford University Press on behalf of the Annals of Botany Company., 2011

Deskripsi Fisik

Annals of Botany 107: 1501–1509, 2011

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

PERTANIAN.

Info Detail Spesifik

-

Pernyataan Tanggungjawab

yuli/agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar