Related Concept Videos
03:02Primary and Secondary Growth in Roots and Shoots
Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many land plants, notably woody plants, also undergo secondary growth—which thickens roots and shoots.
02:26Responses to Gravity and Touch
Gravitropism: Plant Responses to Gravity
02:36Meristems and Plant Growth
Plants grow throughout their lives; this is called indeterminate growth, and it distinguishes plants from most animals. Although certain parts of plants stop growing (e.g., leaves and flowers), others grow continuously—like roots and stems.
02:34Water and Mineral Acquisition
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
02:27Basic Plant Anatomy: Roots, Stems, and Leaves
The primary organs of vascular plants are roots, stems, and leaves, but these structures can be highly variable, adapted for the specific needs and environment of different plant species.
02:02Phloem and Sugar Transport
Like many living organisms, plants have tissues that specialize in specific plant functions. For example, shoots are well adapted to rapid growth, while roots are structured to acquire resources efficiently. However, sugar production is primarily restricted to the photosynthetic cells that reside in the leaves of angiosperm plants. Sugar and other resources are transported from photosynthetic tissues to other specialized tissues by a process called translocation.
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Related Experiment Video
Updated: May 29, 2026
09:21
Multipronged Phenotyping Approaches to Characterize Sugarcane Root Systems
Published on: August 17, 2022
Root hair sweet growth.
Silvia M Velasquez1, Norberto D Iusem, José M Estevez
1Instituto de Fisiología, Biología Molecular y Neurociencias (IFIByNE-CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina.
Plant Signaling & Behavior
|September 16, 2011
Summary
Prolyl 4-hydroxylases (P4Hs) are crucial for root hair growth. Their activity ensures proper modification of cell wall glycoproteins, essential for nutrient absorption and plant development.
Area of Science:
- Plant Biology
- Cell Biology
- Biochemistry
Background:
- Root hairs are vital for water and nutrient uptake.
- Polarized growth, involving cell wall expansion, is key to root hair elongation.
- Cell wall glycoproteins, like extensions (EXTs), are critical for this process.
Purpose of the Study:
- To investigate the role of proline hydroxylation in root hair polarized growth.
- To determine the function of prolyl 4-hydroxylases (P4Hs) in modifying EXTs.
- To understand the link between EXT modification and cell wall assembly during root hair elongation.
Main Methods:
- Biochemical inhibition of P4Hs.
- Genetic disruption of specific P4H genes.
- Microscopic analysis of root hair growth and cell wall structure.
Main Results:
- Inhibition or disruption of P4Hs blocked root hair polarized growth.
- Proline hydroxylation by P4Hs is essential for subsequent O-glycosylation of EXTs.
- Correct hydroxylation and O-glycosylation of EXTs are necessary for cell wall self-assembly and root hair elongation.
Conclusions:
- Prolyl 4-hydroxylases are essential for root hair elongation.
- Post-translational modification of cell wall proteins like EXTs is critical for plant development.
- This study provides insights into the biochemical pathways governing plant cell growth.