Fruit indehiscence caused by enhanced expression of NO TRANSMITTING TRACT in Arabidopsis thaliana.

Kyung Sook Chung, Jeong Hwan Lee, Jong Seob Lee, Ji Hoon Ahn

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In flowering plants, fruit dehiscence enables seed dispersal. Here we report that ntt-3D, an activation tagged allele of NO TRANSMITTING TRACT (NTT), caused a failure of fruit dehiscence in Arabidopsis. We identified ntt-3D, in which the 35S enhancer was inserted adjacent to AT3G-57670, from our activation tagged mutant library. ntt-3D mutants showed serrated leaves, short siliques, and indehiscence phenotypes. NTT-overexpressing plants largely phenocopied the ntt-3D plants. As the proximate cause of the indehiscence, ntt-3D plants exhibited a near absence of valve margin and lignified endocarp b layer in the carpel. In addition, the replum was enlarged in ntt-3D mutants. NTT expression reached a peak in flowers at stage 11 and gradually decreased thereafter and pNTT::GUS expression was mainly observed in the replum, indicating a potential role in fruit patterning. NTT:GFP localized in the nucleus and cytoplasm. FRUITFULL (FUL) expression was downregulated in ntt-3D mutants and ntt-3D suppressed upregulation of FUL in replumless mutants. These results indicate that NTT suppresses FUL, indicating a potential role in patterning of the silique. In seed crops, a reduction in pod dehiscence can increase yield by decreasing seed dispersal; therefore, our results may prove useful as a basis to improve crop yield.

Original languageEnglish
Pages (from-to)519-525
Number of pages7
JournalMolecules and Cells
Volume35
Issue number6
DOIs
Publication statusPublished - 2013 Jun 1

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Arabidopsis
Fruit
Seed Dispersal
Seeds
Cytoplasm
Up-Regulation
Down-Regulation
Alleles
Phenotype

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology

Cite this

Fruit indehiscence caused by enhanced expression of NO TRANSMITTING TRACT in Arabidopsis thaliana. / Chung, Kyung Sook; Lee, Jeong Hwan; Lee, Jong Seob; Ahn, Ji Hoon.

In: Molecules and Cells, Vol. 35, No. 6, 01.06.2013, p. 519-525.

Research output: Contribution to journalArticle

Chung, Kyung Sook ; Lee, Jeong Hwan ; Lee, Jong Seob ; Ahn, Ji Hoon. / Fruit indehiscence caused by enhanced expression of NO TRANSMITTING TRACT in Arabidopsis thaliana. In: Molecules and Cells. 2013 ; Vol. 35, No. 6. pp. 519-525.
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