Navigation Links
A big bunch of tomatoes?
Date:11/17/2008

Why do poppies and sunflowers grow as a single flower per stalk while each stem of a tomato plant has several branches, each carrying flowers? In a new study, published in this week's issue of the open access journal PLoS Biology, Dr. Zachary Lippman and colleagues identify a genetic mechanism that determines the pattern of flower growth in the Solanaceae (nightshade) family of plants that includes tomato, potato, pepper, eggplant, tobacco, petunia, and deadly nightshades. Manipulation of the identified pathway can turn the well known tomato vine into a highly branched structure with hundreds of flower-bearing shoots, and may thereby result in increased crop yields.

While the development of individual flowers is well understood, the molecular mechanisms that determine the architecture of inflorescences - flower-bearing shoots - are not. The way that inflorescences branch determines the number and distribution of flowers; in peppers (capsicum) inflorescences do not branch, so flowers are singular; in tomatoes, inflorescence branching is repetitive and regular, forming a zigzagged vine The tomato mutants anantha (an) and compound inflorescence (s) have long been known to produce large numbers of branches and flowers, and the new work elucidates the underlying genetics.

Dr. Lippman, and a team of researchers drawn from three institutions in Israel, investigated inflorescence branching by studying these mutant tomato plants. They identified the genes responsible: the anantha (AN) and compound inflorescence (S) genes. S is a member of the well known homeobox gene family, which plays a crucial regulatory role in patterning both animals and plants. Lippman et al. have shown that manipulation of these genes in tomato plants can dramatically alter the architecture and number of inflorescences, and that altered activity of AN in pepper plants can stimulate branching. Variation in S also explains the branching variation seen in domestically grown tomato strains.

The two genes work in sequence to regulate the timing of development of a branch and a flower so, for example, slowing down the pathway that makes a flower allows for additional branches to grow. While this study by Lippman et al. focuses on variations in particular nightshades, the insight leads to a new understanding of how many plants, such as trees, control their potential to branch.


'/>"/>

Contact: Sally Hubbard
press@plos.org
Public Library of Science
Source:Eurekalert

Related biology news :

1. Grapes may aid a bunch of heart risk factors, animal study finds
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/16/2017)... --  Bridge Patient Portal , an enterprise patient ... Systems , an electronic medical record solutions developer ... a partnership to build an interface between the ... products, including Centricity Practice Solution (CPS), Centricity Business ... integrations will allow healthcare delivery networks using GE ...
(Date:4/17/2017)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... Annual Report on Form 10-K on Thursday April 13, 2017 with ... ... Relations section of the Company,s website at http://www.nxt-id.com  under "SEC ... . 2016 Year Highlights: Acquisition ...
(Date:4/11/2017)... , April 11, 2017 No two ... researchers at the New York University Tandon School ... Engineering have found that partial similarities between prints ... used in mobile phones and other electronic devices ... The vulnerability lies in the fact that ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... , ... October 12, 2017 ... ... announces publication of a United States multicenter, prospective clinical study that demonstrates ... point-of-care diagnostic test capable of identifying clinically significant acute bacterial and viral ...
(Date:10/11/2017)... ... October 11, 2017 , ... The CRISPR-Cas9 system ... experiments and avoiding the use of exogenous expression plasmids. The simplicity of programming ... systematic gain-of-function studies. , This complement to loss-of-function studies, such as with ...
(Date:10/11/2017)... and LAGUNA HILLS, Calif. , Oct. 11, ... Research, London (ICR) and University of ... SkylineDx,s prognostic tool to risk-stratify patients with multiple myeloma (MM), ... nine . The University of Leeds ... funded by Myeloma UK, and ICR will perform the testing ...
(Date:10/10/2017)... Angeles, CA (PRWEB) , ... ... ... Inc., a development-stage cancer-focused pharmaceutical company advancing targeted antibody-drug conjugate (ADC) therapeutics, ... uses of targeted HPLN (Hybrid Polymerized Liposomal Nanoparticle), a technology developed in ...
Breaking Biology Technology: