Original video: https://youtu.be/dn8fXVtAtFA
Delivered on: 25 March 2024
The biological function of seeds is for propagation of the species. Lecture on seed physiology explores the structure of seeds (embryo, food reserves, and protective coat) in both monocots and dicots, delves into the fascinating phenomenon of seed dormancy – a "sleeping" state that ensures germination under favorable conditions, and examines various methods to break dormancy, such as scarification, stratification, and light exposure. Emphasizes the importance of genetic diversity for plant survival, highlights the diverse mechanisms of seed dispersal, and discusses seed viability, vigor, and longevity, captivating students with intriguing examples like the tiny orchid seed, the giant coco de mer, and the role of fire in seed germination.
Seeds are for propagation
• Protect the zygote against physically injury
• Store foods for seedling-- before it becomes independent
• Remain dormant to survive harsh environment
• Disperse the seeds to capitalize on their genetic variability
• Respond to environment cues and germinate at the right time and place
Seeds are alive!
Endospermous seeds: Retain the endosperm tissue, and is surrounded by a layer of living cells, the aleurone layer.
Non-endospermous seeds: The endosperm tissue is absorbed by the cotyledons. The cotyledons then become the food reserve for the seed.
Watch part 2 here: https://youtu.be/MBSLjvlR-Tg
Keywords: seed physiology, seed dormancy, seed germination, seed structure, seed dispersal, seed viability, seed longevity, monocot seed, dicot seed, endosperm, cotyledon, testa, seed coat, scarification, stratification, genetic diversity, plant hormones, ABA, GA, lesson, UPM
Location:
Faculty of Agriculture, Universiti Putra Malaysia
Fakulti Pertanian, Universiti Putra Malaysia, 43000 Seri Kembangan, Selangor
XPMM+9J Seri Kembangan, Selangor
2.9845517506267742, 101.73803356324866
Attribution 4.0 International — CC BY 4.0 - Creative Commons
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