Embryons somatiques de Vitis rupestris et embryons zygotiques de Vitis sp. : morphologie, histologie, histochimie et développement

  title={Embryons somatiques de Vitis rupestris et embryons zygotiques de Vitis sp. : morphologie, histologie, histochimie et d{\'e}veloppement},
  author={Olivier Faure},
The problem of the development of grapevine somatic embryos into plantlets was examined through a morphological, histological, and histochemical comparison of zygotic and somatic embryos. Only 3% of somatic embryos were capable of developing into plantlets. However, 27% of these embryos had shoot and root apices showing a histological pattern similar to that observed in zygotic embryos; other embryos had root apex but no shoot apex. In comparison with zygotic embryos, somatic embryos showed the… Expand
Ontogenesis, Differentiation and Precocious Germination in Anther-derived Somatic Embryos of Grapevine ( Vitis vinifera L.): Embryonic Organogenesis
Morphological, histological and cytochemical data were used to study development from the globular to the giant-embryo stage of somatic embryos of Vitis vinifera L. ‘Grenache noir’ and the phenomenon of precocious germination often observed for immature zygotic embryos in in vitro culture is discussed. Expand
Somatic embryogenesis and histological analysis from zygotic embryos in Vitis vinifera L. ‘Moldova’
The developmental processes of somatic embryos were similar to those of zygotic embryos, including typical epiderma, cotyledon primordium and vascular tissue, and dynamic changes of proteins and starch grains were demonstrated. Expand
A comparison between Theobroma cacao L. zygotic embryogenesis and somatic embryogenesis from floral explants
A histological study showed that somatic embryos lacked starch and protein reserves; moreover, their water content was much higher than that of their zygotic counterparts, and introducing a growth period into the culture protocol made for better embryo development. Expand
Histological study of embryogenesis and organogenesis from anthers ofVitis rupestris du Lot cultured in vitro
SummaryAnthers ofVitis rupestris du Lot were cultured in vitro at the uninucleate stage of the microspore, in order to investigate the histology of embryogenic and organogenic processes in thisExpand
Comparative anatomy and morphology of Vitis vinifera (Vitaceae) somatic embryos from solid- and liquid-culture-derived proembryogenic masses.
It is hypothesize that the presence of a persistent suspensor in LPEM-derived somatic embryos modulates development, ultimately resulting in rapid germination and a high plant-regeneration rate. Expand
Arrest of somatic embryo development in grapevine: histological characterization and the effect of ABA, BAP and zeatin in stimulating plantlet development
Applied in combination with ABA, these PGRs increased the frequency of cotyledonary embryos, but decreased the conversion rate. Expand
Metabolism of reserve products during development of somatic embryos and germination of zygotic embryos in grapevine
The abnormal and teratological development of grapevine somatic embryos is discussed and this behaviour is compared with the precocious germination observed in in vitro cultured immature zygotic embryos. Expand
Long-term somatic embryogenesis and maturation of somatic embryos in Hevea brasiliensis
A high frequency of secondary embryogenesis was induced from isolated early cotyledonary-stage somatic embryos of Hevea brasiliensis and the addition of 234 mM sucrose as stress with sucrose and 10−5 M abscisic acid to the culture medium enhanced the maturation of Somatic embryos. Expand
Nuclear DNA content of somatic and zygotic embryos ofVitis vinifera cv. Grenache noir at the torpedo stage
It is suggested that the in vitro culture conditions which were used could be incompatible with normal morphogenesis from the torpedo stage, and the genetical and environmental causes of the low level of conversion of grapevine somatic embryos into plantlets are discussed. Expand
Anomalous somatic embryos formation and plant regeneration from the cultures of immature embryos of Camellia japonica L.
It is demonstrated that the anomalous cotyledons of somatic embryos could caused to decrease the rate of plant regeneration. Expand