Abstract
In conventional culture conditions without auxin, somatic embryos arising from suspension cultures of grapevine rootstock 41B (Vitis vinifera cv. Chasselas x Vitis berlandieri) are arrested at the heart stage of development. Starting from indications that inhibitors excreted in the culture medium could be responsible for this arrest, new culture conditions based on daily subculturing embryos in fresh medium have been successfully used to obtain full embryo development. From this technique, a microassay was devised for screening small amounts of extracellular molecules as potential inhibitors of embryonic development. Our results show that extracellular macromolecules of molecular weight higher than 10 kDa are likely involved in the inhibition of caulinary meristem initiation. However, other factors obviously cooperate to inhibit embryo development in conventional culture conditions
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Abbreviations
- CH76:
-
cv. Chardonnay clone 76 (Vitis vinifera)
- NOA:
-
2-naphthoxyacetic acid
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Coutos-Thevenot, P., Goebel-Tourand, I., Mauro, MC. et al. Somatic embryogenesis from grapevine cells. I-Improvement of embryo development by changes in culture conditions. Plant Cell Tiss Organ Cult 29, 125–133 (1992). https://doi.org/10.1007/BF00033617
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DOI: https://doi.org/10.1007/BF00033617