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Related Experiment Videos

Leaf development and leaf stress: increased susceptibility associated with sink-source transition.

James S. Coleman1

  • 1School of Forestry and Environmental Studies, Yale University, Greeley Memorial Laboratory, 370 Prospect Street, New Haven, CT 06511, USA.

Tree Physiology
|December 1, 1986
PubMed
Summary

Leaf susceptibility to stress changes with age, peaking during the sink-source transition. This concept helps explain plant-pest interactions and distribution patterns.

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Area of Science:

  • Plant physiology
  • Ecology
  • Evolutionary biology

Background:

  • Leaf age influences susceptibility to biotic and abiotic stresses.
  • Existing research lacks a unifying concept for leaf ontogeny and stress susceptibility.

Purpose of the Study:

  • To propose a unifying concept relating leaf ontogeny to stress susceptibility.
  • To identify the stage of maximum leaf susceptibility to stress.

Main Methods:

  • Review of existing literature on leaf physiology and stress responses.
  • Conceptual framework development based on leaf ontogenetic stages.

Main Results:

  • Leaves progress through distinct physiological stages: sink, source, and senescence.

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  • Maximum susceptibility to many leaf stresses occurs during the sink-source transition.

    • Conclusions:

    • Leaf ontogeny, particularly the sink-source transition, is a critical factor in stress susceptibility.
    • This concept can inform understanding of plant-herbivore and plant-pathogen dynamics.