Crop Science pp 185-194 | Cite as

Source–Sink Relationships in Cereals and Legumes

  • Patricio Sandaña
  • Daniel F. CalderiniEmail author
Reference work entry
Part of the Encyclopedia of Sustainability Science and Technology Series book series (ESSTS)


Critical period

Correspond to the time lapse during the crop cycle in which grain number per square meter is highly sensitive to environmental conditions.

Crop development

The sequence of processes and events involved in producing new organs throughout the crop cycle of a crop.

Grain filling period

Time lapse of grain growth from flowering to physiological maturity.

Source–sink relationship

Refers to the balance between the assimilate production in photosynthesis and the assimilate utilization for grain yield of crops.

Definition of the Subject

Cereals and grain legume crops are widely sown along the world and their importance as a source of feed and food is indisputable mainly as a source of carbohydrates and proteins, respectively. Grain yield of these crops can be defined as the product of grain number per unit area and the average grain weight. Source-sink manipulations, in cereals, have shown the critical period for grain number determination occurs mainly at the...


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Instituto de Investigaciones Agropecuarias, INIA-RemehueOsornoChile
  2. 2.Institute of Plant Production and Protection, Universidad Austral de ChileValdiviaChile

Section editors and affiliations

  • Roxana Savin
    • 1
  • Gustavo Slafer
    • 2
  1. 1.Department of Crop and Forest Sciences and AGROTECNIO, (Center for Research in Agrotechnology)University of LleidaLleidaSpain
  2. 2.Department of Crop and Forest SciencesUniversity of LleidaLleidaSpain

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