The hypocotyl (short for "hypocotyledonous stem", [1] meaning "below seed leaf") is the stem of a germinating seedling, found below the cotyledons (seed leaves) and above the radicle (root). As the plant embryo grows at germination, it sends out a shoot called a radicle that becomes the primary root, and then penetrates down into the soil.

The hypocotyl is the first part of the embryo to emerge from a seed that has been planted in the soil.

The hypocotyl is the part of a seedling that connects the cotyledons (seed leaves) to the root system, serving as a crucial transitional zone during germination and early growth. It plays an essential role in the development of the plant, as it elongates to push the cotyledons above the soil, allowing for better light exposure and photosynthesis.

…a transition region called the hypocotyl. In the developing embryo, the hypocotyl is the embryonic axis that bears the seedling leaves (cotyledons). …other four will form the hypocotyl, the part of the embryo between the cotyledons and the primary root (radicle).

The hypocotyl is the short segment of stem between the cotyledons and roots. It never elongated enough to push the cotyledons above the ground. There is a central, thick root called the primary (tap) root.

Hypocotyl elongation is a vital process that drives seedling emergence, light capture, and the establishment of structural integrity in plants. It involves cellular expansion, cell wall modification, microtubule organization, and the coordination of various phytohormones and …

The growth direction of the Arabidopsis (Arabidopsis thaliana) etiolated-seedling hypocotyl is a complex trait that is controlled by extrinsic signals such as gravity and touch as well as intrinsic signals such as hormones (brassinosteroid [BR], ...

To provide a framework for the molecular-genetic analysis of cell elongation in this organ, here we describe, at the cellular level, its morphology and growth and identify a number of characteristic, developmental differences between light-grown and dark-grown hypocotyls.

Hypocotyl elongation is a critical sign of seed germination and seedling growth, and it is regulated by multi-environmental factors. Light, temperature, and water potential are the major environmental stimuli, and their regulatory mechanism on ...

2014年3月16日 · In this review, we provide evidence that the hypocotyl serves as ideal model object to study cell expansion mechanisms and its regulation. We focus on the regulation of hypocotyl development by light and highlight the key modulating proteins in …