Genetic control of inflorescence architecture in legumes
Autor
Benlloch, Reyes
Berbel, Ana
All, Latifeh
Gohari, Gholamreza
Millán, Teresa
Madueño, Francisco
Editor
FrontiersFecha
2015Materia
LegumesPea
Inflorescence architecture
Meristem identity
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The architecture of the inflorescence, the shoot system that bears the flowers, is a
main component of the huge diversity of forms found in flowering plants. Inflorescence
architecture has also a strong impact on the production of fruits and seeds, and on crop
management, two highly relevant agronomical traits. Elucidating the genetic networks
that control inflorescence development, and how they vary between different species,
is essential to understanding the evolution of plant form and to being able to breed key
architectural traits in crop species. Inflorescence architecture depends on the identity
and activity of the meristems in the inflorescence apex, which determines when flowers
are formed, how many are produced and their relative position in the inflorescence axis.
Arabidopsis thaliana, where the genetic control of inflorescence development is best
known, has a simple inflorescence, where the primary inflorescence meristem directly
produces the flowers, which are thus borne in the main inflorescence axis. In contrast,
legumes represent a more complex inflorescence type, the compound inflorescence,
where flowers are not directly borne in the main inflorescence axis but, instead, they
are formed by secondary or higher order inflorescence meristems. Studies in model
legumes such as pea (Pisum sativum) or Medicago truncatula have led to a rather
good knowledge of the genetic control of the development of the legume compound
inflorescence. In addition, the increasing availability of genetic and genomic tools for
legumes is allowing to rapidly extending this knowledge to other grain legume crops.
This review aims to describe the current knowledge of the genetic network controlling
inflorescence development in legumes. It also discusses how the combination of this
knowledge with the use of emerging genomic tools and resources may allow rapid
advances in the breeding of grain legume crops.