HSBMB-peach - H ellenic Socie ty of Biochemi stry & M o...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Genes involved in regulation of peach fruit development and their role in split-pit formation E. Tani 1 , A. Polidoros 1 , A. Tsaftaris 1,2 1 Institute of Agobiotechnology (IN.A.) - Center for Research and Technology Hellas (CERTH), Thermi,Thessaloniki, GREECE. 2 Department of Genetics and Plant Breeding, AUTH, Thessaloniki Email addresses: E.T: etani@certh.gr , A.P: alexios@certh.gr , A.T.: tsaft@certh.gr Abstract Expression of MADS-box regulatory genes involved in peach fruit development was examined in split-pit sensitive and tolerant varieties, as well as, after common treatments in peach cultivation practice. Expression of FRUITFUL that is required for the expansion and differentiation of the fruit after fertilization in Arabidopsis displayed a similar pattern in both plants. SHATERPROOF that is required for the differentiation and lignification of the dehiscence zone in Arabidopsis was not detectable in peach, indicating either that another homologous gene may be expressed or that more sensitive methods are needed for assessment of its expression. Further experiments are underway to unravel peach fruit development and the cause of split-pit that deteriorates fruit quality. Introduction Peach cultivation of clingstone varieties is important for Greek agriculture and canning industry, as Greece has been the second, next to USA, canned peach producer worldwide, and the first exporter among EU countries. This robust agro-industrial enterprise faced severe problems the last 2-3 years, as a result of adverse weather conditions, but also from deterioration of canned fruit quality due to the presence of small pit fragments originated from split-pits during processing. Split-pits are a recurring problem in peaches due to genetic as well as environmental factors. The term "split- pit" refers to the opening of the pit at the stem end and splitting of the fruit. Any treatment that promotes fruit growth at the start of pit hardening tends to increase the number of split-pits. Split- pits may result from early excessive thinning caused by frost followed by irrigation or rains. Girdling of tree limbs by wire and excessive nitrogen may also promote the problem. Early maturing varieties are particularly prone to split pits, as are varieties in which pit hardening is relatively late. Understanding the genetic factors underlying split-pit sensitivity in peach may provide the tools for breeding resistant varieties and molecular markers for better management of existing cultivars. Split-pit occurs at a specific zone of the pit destined to open for the release of the seed. Fruits have evolved to mediate the maturation and dispersal of seeds. Fruit dehiscence is a strategy that many fruits adopt to achieve seed dispersal. The dehiscence process involves the differentiation of specialized cell types and a tight co-ordination of molecular and biochemical events that eventually lead to a cell separation process that frees the seeds once they have matured. In the last
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

HSBMB-peach - H ellenic Socie ty of Biochemi stry & M o...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online