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Related Concept Videos

Plant Hormones01:56

Plant Hormones

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Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones are often produced in specific glands and circulated via the circulatory system. However, plants lack hormone-producing glands.
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Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
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Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
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Water-soluble hormones cannot cross the plasma membrane, so they rely on protein receptors that span the membrane to trigger intracellular signaling pathways. These pathways then activate second messengers inside the cell, including cAMP or calcium ions.
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Monitoring Plant Hormones During Stress Responses
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Quo vadis plant hormone analysis?

Danuše Tarkowská1, Ondřej Novák, Kristýna Floková

  • 1Laboratory of Growth Regulators, Centre of the Region Haná for Biotechnological and Agricultural Research, Institute of Experimental Botany ASCR and Palacký University, Šlechtitelů 11, 783 71, Olomouc, Czech Republic, tarkowska@ueb.cas.cz.

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Summary

Plant hormone profiling, essential for understanding plant physiology, faces challenges due to trace amounts in complex matrices. This review covers advances and future directions in analyzing plant hormones and their metabolites.

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Area of Science:

  • Plant Biology
  • Biochemistry
  • Analytical Chemistry

Background:

  • Plant hormones are crucial chemical messengers regulating diverse physiological processes.
  • Nine major groups of plant hormones are known, with potential for new discoveries.
  • Hormonal regulation involves complex interactions, both within and between hormone groups.

Purpose of the Study:

  • To review current advancements, trends, and future perspectives in plant hormone analysis.
  • To address the challenges associated with hormone profiling in complex plant samples.
  • To discuss methods for extracting and separating plant hormones, precursors, and metabolites.

Main Methods:

  • Review of existing literature on plant hormone analysis techniques.
  • Discussion of challenges in sample preparation, including extraction from plant tissues.
  • Exploration of separation techniques to resolve interfering compounds.

Main Results:

  • Significant progress has been made in analytical methodologies for plant hormones.
  • Extraction and separation from complex plant matrices remain key challenges.
  • Current trends focus on comprehensive profiling of hormones and their metabolic pathways.

Conclusions:

  • Accurate quantification of plant hormones and their metabolites is vital for understanding plant signaling.
  • Overcoming matrix effects and improving extraction/separation efficiency are critical for advancing hormone profiling.
  • Future research should focus on developing more sensitive and robust analytical methods.