Connecting proline metabolism and signaling pathways in plant senescence

Lu Zhang, Donald F Becker

Research output: Contribution to journalReview article

37 Citations (Scopus)

Abstract

The amino acid proline has a unique biological role in stress adaptation. Proline metabolism is manipulated under stress by multiple and complex regulatory pathways and can profoundly influence cell death and survival in microorganisms, plants, and animals. Though the effects of proline are mediated by diverse signaling pathways, a common theme appears to be the generation of reactive oxygen species (ROS) due to proline oxidation being coupled to the respiratory electron transport chain. Considerable research has been devoted to understand how plants exploit proline metabolism in response to abiotic and biotic stress. Here, we review potential mechanisms by which proline metabolism influences plant senescence, namely in the petal and leaf. Recent studies of petal senescence suggest proline content is manipulated to meet energy demands of senescing cells. In the flower and leaf, proline metabolism may influence ROS signaling pathways that delay senescence progression. Future studies focusing on the mechanisms by which proline metabolic shifts occur during senescence may lead to novel methods to rescue crops under stress and to preserve post-harvest agricultural products.

Original languageEnglish (US)
Article number552
Pages (from-to)1-8
Number of pages8
JournalFrontiers in Plant Science
Volume6
Issue numberJULY
DOIs
StatePublished - Jul 22 2015

Fingerprint

proline
metabolism
corolla
reactive oxygen species
electron transport chain
agricultural products
biotic stress
abiotic stress
cell viability
preserves
cell death
leaves
oxidation
microorganisms
flowers
amino acids
energy
crops
animals

Keywords

  • <sup>1</sup>Δ-pyrroline-5-carboxylate synthetase
  • Plant senescence
  • Proline
  • Proline dehydrogenase
  • Reactive oxygen species

ASJC Scopus subject areas

  • Plant Science

Cite this

Connecting proline metabolism and signaling pathways in plant senescence. / Zhang, Lu; Becker, Donald F.

In: Frontiers in Plant Science, Vol. 6, No. JULY, 552, 22.07.2015, p. 1-8.

Research output: Contribution to journalReview article

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