Do recalcitrant seeds really exist
Claudio José Barbedo,Danilo da Cruz Centeno,Rita de Cássia Leone Figueiredo Ribeiro +2 more
- Vol. 40, Iss: 4, pp 583-593
TLDR
It seems that the differences between recalcitrant and orthodox seeds lie only on the maturity stage in which they are detached from the mother plant, the recalcitrants ones in a very immature stage, which implies that little progress should be expected to expand the storability of these recal citrant seeds with the application of any treatment after harvesting.Abstract:
In the 70's, seeds were divided into two categories: recalcitrant and orthodox. In the 80's, it was necessary to create an intermediate category; from the 90's onwards, a gradient between orthodox and recalcitrant categories has been considered by several authors. Currently, the terms orthodox and recalcitrant are appropriate just for technological purposes, not for scientific studies. It seems that the differences between recalcitrant and orthodox seeds lie only on the maturity stage in which they are detached from the mother plant, the recalcitrant ones in a very immature stage. This implies that little progress should be expected to expand the storability of these recalcitrant seeds with the application of any treatment after harvesting. Efforts shall be focused on amplifying the maturation period of these seeds by keeping them linked to the mother plant until the maturation process has been completed.read more
Citations
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Journal ArticleDOI
A new approach towards the so-called recalcitrant seeds
TL;DR: A new approach to understanding the differences betweenorthodox and recalcitrant seeds is presented here based on seed maturation, environmental influences, and evolution, and some new perspectives are considered for the recal citrant seed conservation technology.
Journal ArticleDOI
Changes in genomic 5-methylcytosine level mirror the response of orthodox (Acer platanoides L.) and recalcitrant (Acer pseudoplatanus L.) seeds to severe desiccation.
Beata Patrycja Plitta-Michalak,Mirosława Z. Naskręt-Barciszewska,S. Kotlarski,Dominik Tomaszewski,Tadeusz Tylkowski,Jan Barciszewski,Paweł Chmielarz,Marcin Michalak +7 more
TL;DR: In the present comparative study, changes in the global levels of 5-methylcytosine (m5C) in orthodox and recalcitrant seeds of Acer platanoides L. and Acer pseudoplatanus L. were characterized during progressive stages of severe drying to indicate that desiccation-induced changes in m5C are both tissue- and seed category-specific and are highly correlated with recal citrant seed viability.
Journal ArticleDOI
Variations in desiccation tolerance in seeds of Eugenia pyriformis: dispersal at different stages of maturation
Edmir Vicente Lamarca,Marcelo Bento Paes de Camargo,Simone de Pádua Teixeira,Edvaldo Aparecido Amaral da Silva,José Marcio Rocha Faria,Claudio José Barbedo +5 more
TL;DR: The aim of this study was to analyse whether the degree of tolerance to desiccation of uvaieira seeds depends on the stage of maturation of the seeds at shedding, including the environmental conditions in which the seeds develop, includingthe accumulation of degree-days and rainfall in the period.
Journal ArticleDOI
Metabolic Changes on the Acquisition of Desiccation Tolerance in Seeds of the Brazilian Native Tree Erythrina speciosa.
Aline F Hell,Fernanda S. Kretzschmar,Kelly Simões,Arnd G. Heyer,Claudio José Barbedo,Marcia R. Braga,Danilo da Cruz Centeno +6 more
TL;DR: It is confirmed that raffinose is involved in desiccation tolerance in seeds of E. speciosa, especially considering the different subcellular compartments and suggests even that the acquisition of desiccence tolerance in this species occurs in stages prior to the major changes in WC.
Journal ArticleDOI
Tomato seed image analysis during the maturation
Shara Regina dos Santos Borges,Patrícia Pereira da Silva,Fernando dos Santos Araújo,Flívia Fernandes de Jesus Souza,Warley Marcos Nascimento +4 more
TL;DR: The correlations involving the analysis of X-ray showed that the seeds have embryos classified as normal tend to have higher vigor and produce normal seedlings, on the other hand, seeds with higher internal free area tend to be have low vigors and higher percentage of abnormal seedlings.
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