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प्रश्न
Highlight the milestones from the history of plant embryology.
उत्तर
- 1682 – Nehemiah Grew mentioned stamens as the male organ of a flower.
- 1694 – R.J. Camerarius described the structure of a flower, anther, pollen, and ovule
- 1761 – J.G. Kolreuter gave a detailed account of the importance of insects in pollination.
- 1824 – G.B. Amici discovered the pollen tube.
- 1848 – Hofmeister described the structure of pollen tetrad.
- 1870 – Hanstein described the development of embryos in Capsella and Alisma.
- 1878 – E. Strasburger reported polyembryony.
- 1884 – E. Strasburger discovered the process of Syngamy.
- 1899 – S.G. Nawaschin and L. Guignard independently discovered Double fertilization.
- 1904 - E. Hanning initiated embryo culture.
- 1950 – D.A. Johansen proposed classification for embryo development.
- 1964 – S. Guha and S.C. Maheswari raised haploids from Datura pollen grains
- 1991 – E.S. Coen and E.M. Meyerowitz proposed the ABC model to describe the genetics of initiation and development of floral parts
- 2015 – K.V. Krishnamurthy summarized the molecular aspects of pre and post-fertilization reproductive development in flowering plants.
संबंधित प्रश्न
If one can induce parthenocarpy through the application of growth substances, which fruits would you select to induce parthenocarpy and why?
An eminent Indian embryologist is
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Give examples for the Helobial endosperm.
‘Endothecium is associated with dehiscence of anther’ Justify the statement.
What is endosperm? Explain the types.
Differentiate the structure of Dicot and Monocot seed.
During which of the following free nuclear divisions occurs in angiosperms?
Following figure represents monocot embryo Identify labels P, Q, Rand S.
Which among these is NOT a post-fertilization event?