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Related Concept Videos

Defenses Against Pathogens and Herbivores02:26

Defenses Against Pathogens and Herbivores

Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.
Introduction to Plant Diversity02:22

Introduction to Plant Diversity

From Water to Land
Plant Cell Wall02:43

Plant Cell Wall

The plant cell wall gives plant cells shape, support, and protection. As a cell matures, its cell wall specializes according to the cell type. For example, the parenchyma cells of leaves possess only a thin, primary cell wall.Collenchyma and sclerenchyma cells, on the other hand, mainly occur in the outer layers of a plant's stems and leaves. These cells provide the plant with strength and support by either partially thickening their primary cell wall (i.e., collenchyma), or depositing a...
Plant Cell Wall01:07

Plant Cell Wall

Plant cells have a cell wall, a rigid outer covering that protects the cell and provides shape and support. During cell division, a mixture of enzymes, proteins, and glucose molecules is transported via vesicles to the center of the cell. These vesicles continuously fuse and build a cell plate between the dividing cells. As the cell plate matures, new polysaccharides are added to it to form the cell walls of the daughter cells. The predominant polysaccharide in the cell wall is cellulose, made...
Plant Hormones01:56

Plant Hormones

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.
Plant Breeding and Biotechnology01:59

Plant Breeding and Biotechnology

Crop cultivation has a long history in human civilization, with records showing the cultivation of cereal plants beginning at around 8000 BC. This early plant breeding was developed primarily to provide a steady supply of food.

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Related Experiment Video

Updated: Jul 3, 2026

Bacterial Leaf Infiltration Assay for Fine Characterization of Plant Defense Responses using the Arabidopsis thaliana-Pseudomonas syringae Pathosystem
11:50

Bacterial Leaf Infiltration Assay for Fine Characterization of Plant Defense Responses using the Arabidopsis thaliana-Pseudomonas syringae Pathosystem

Published on: October 1, 2015

Plant biology: do DELLAs do defence?

Nick Smirnoff1, Murray Grant

  • 1School of Biosciences, University of Exeter, Stocker Road, Exeter EX4 4QD, UK.

Current Biology : CB
|July 23, 2008
PubMed
Summary

DELLA proteins limit plant growth, but this restraint helps plants survive stress by redirecting resources toward pathogen defense. This highlights a crucial trade-off in plant survival strategies.

Area of Science:

  • Plant Biology
  • Molecular Biology
  • Stress Physiology

Background:

  • DELLA proteins are known repressors of plant growth and development.
  • Emerging evidence suggests a role for DELLAs in stress tolerance.
  • Understanding the molecular mechanisms of DELLA-mediated stress responses is crucial for agriculture.

Purpose of the Study:

  • To elucidate the role of DELLA proteins in plant stress survival.
  • To investigate how DELLA-mediated growth restraint impacts pathogen defense.
  • To explore the resource allocation strategies under stress conditions.

Main Methods:

  • Analysis of plant growth phenotypes under various stress conditions.
  • Gene expression profiling related to defense pathways.

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Identification of Post-translational Modifications of Plant Protein Complexes
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Identification of Post-translational Modifications of Plant Protein Complexes

Published on: February 22, 2014

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Last Updated: Jul 3, 2026

Bacterial Leaf Infiltration Assay for Fine Characterization of Plant Defense Responses using the Arabidopsis thaliana-Pseudomonas syringae Pathosystem
11:50

Bacterial Leaf Infiltration Assay for Fine Characterization of Plant Defense Responses using the Arabidopsis thaliana-Pseudomonas syringae Pathosystem

Published on: October 1, 2015

Live-cell Imaging of Fungal Cells to Investigate Modes of Entry and Subcellular Localization of Antifungal Plant Defensins
08:39

Live-cell Imaging of Fungal Cells to Investigate Modes of Entry and Subcellular Localization of Antifungal Plant Defensins

Published on: December 24, 2017

Identification of Post-translational Modifications of Plant Protein Complexes
10:07

Identification of Post-translational Modifications of Plant Protein Complexes

Published on: February 22, 2014

  • Biochemical assays to assess resource allocation.

    • Main Results:

    • DELLA protein activity was correlated with reduced growth during stress.
    • Plants with DELLA repression showed enhanced pathogen resistance.
    • Resource reallocation from growth to defense mechanisms was observed.

    Conclusions:

    • DELLA proteins play a vital role in plant stress adaptation by balancing growth and defense.
    • Growth restraint imposed by DELLAs is a key survival mechanism under stress.
    • Targeting DELLA pathways could improve crop resilience to environmental challenges.