نتایج جستجو برای: hard seed coat

تعداد نتایج: 239663  

Journal: :Ecology 2008
Anna Traveset Javier Rodríguez-Pérez Beatriz Pías

The effectiveness of a frugivore as a disperser of a plant is greatly determined by how fruits and seeds are handled in its mouth and its digestive tract. Although a number of studies have investigated the effect of avian ingestion on germination, we still know very little about the modifications to seeds during ingestion and the specific consequences on plant fitness. Here we investigate for t...

Journal: :Journal of experimental botany 2015
Na Li Yunhai Li

Seed size is a key determinant of evolutionary fitness, and is also one of the most important components of seed yield. In angiosperms, seed development begins with double fertilization, which leads to the formation of a diploid embryo and a triploid endosperm. The outermost layer of the seed is the seed coat, which differentiates from maternal integuments. Therefore, the size of a seed is dete...

2013
Mineo Senda Satsuki Nishimura Atsushi Kasai Setsuzo Yumoto Yoshitake Takada Yoshinori Tanaka Shizen Ohnishi Tomohisa Kuroda

In soybean, the I gene inhibits pigmentation over the entire seed coat, resulting in yellow seeds. It is thought that this suppression of seed coat pigmentation is due to naturally occurring RNA silencing of chalcone synthase genes (CHS silencing). Fully pigmented seeds can be found among harvested yellow seeds at a very low percentage. These seed coat pigmented (scp) mutants are generated from...

Journal: :The Plant cell 2013
Catalin Voiniciuc Gillian H Dean Jonathan S Griffiths Kerstin Kirchsteiger Yeen Ting Hwang Alan Gillett Graham Dow Tamara L Western Mark Estelle George W Haughn

Pectins are complex polysaccharides that form the gel matrix of the primary cell wall and are abundant in the middle lamella that holds plant cells together. Their degree of methylesterification (DM) impacts wall strength and cell adhesion since unesterified pectin regions can cross-link via Ca(2+) ions to form stronger gels. Here, we characterize flying saucer1 (fly1), a novel Arabidopsis thal...

2017
Jun-cai Deng Cai-qiong Yang Jing Zhang Qing Zhang Feng Yang Wen-yu Yang Jiang Liu

Prolonged, continuous rainfall is the main climatic characteristic of autumn in Southwest China, and it has been found to cause mildew outbreaks in pre-harvest soybean fields. Low temperature and humidity (LTH) stress during soybean maturation in the field promotes pre-harvest mildew, resulting in damage to different organs of soybean fruits to different extents, but relatively little informati...

Journal: :The Plant cell 2002
Cameron S Johnson Ben Kolevski David R Smyth

Mutants of a new gene, TRANSPARENT TESTA GLABRA2 (TTG2), show disruptions to trichome development and to tannin and mucilage production in the seed coat. The gene was tagged by the endogenous transposon Tag1 and shown to encode a WRKY transcription factor. It is the first member of this large, plant-specific family known to control morphogenesis. The functions of all other WRKY genes revealed t...

2016
Jana L. Phan Matthew R. Tucker Shi Fang Khor Neil Shirley Jelle Lahnstein Cherie Beahan Antony Bacic Rachel A. Burton

Xylans are the most abundant non-cellulosic polysaccharide found in plant cell walls. A diverse range of xylan structures influence tissue function during growth and development. Despite the abundance of xylans in nature, details of the genes and biochemical pathways controlling their biosynthesis are lacking. In this study we have utilized natural variation within the Plantago genus to examine...

Journal: :Annals of botany 2012
Deepak Barua Colleen Butler Tracy E Tisdale Kathleen Donohue

BACKGROUND AND AIMS Despite the intense interest in phenological adaptation to environmental change, the fundamental character of natural variation in germination is almost entirely unknown. Specifically, it is not known whether different genotypes within a species are germination specialists to particular conditions, nor is it known what physiological mechanisms of germination regulation vary ...

Journal: :The Plant cell 2013
Susana Saez-Aguayo Marie-Christine Ralet Adeline Berger Lucy Botran David Ropartz Annie Marion-Poll Helen M North

Imbibed seeds of the Arabidopsis thaliana accession Djarly are affected in mucilage release from seed coat epidermal cells. The impaired locus was identified as a pectin methylesterase inhibitor gene, PECTIN METHYLESTERASE INHIBITOR6 (PMEI6), specifically expressed in seed coat epidermal cells at the time when mucilage polysaccharides are accumulated. This spatio-temporal regulation appears to ...

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