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Phenomic networks reveal largely independent root and shoot adjustment in waterlogged plants of L otus japonicus
Author(s) -
STRIKER GUSTAVO G.,
CASAS CECILIA,
MANZUR MILENA E.,
PLOSCHUK ROCÍO A.,
CASAL JORGE J.
Publication year - 2014
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/pce.12268
Subject(s) - aerenchyma , shoot , waterlogging (archaeology) , biology , xylem , botany , stomatal conductance , horticulture , agronomy , ecology , photosynthesis , wetland
Waterlogging imposes severe stress to the plant, and the interplay between root and aerial organs in the adjustment to this stress is poorly understood. A set of recombinant inbred lines ( RILs ) of L otus japonicus ( G ifu B ‐129 × M iyakojima MG ‐20) was subjected to control and waterlogging conditions for 21 d, and 12 traits related to leaf physiological functioning, root aerenchyma formation, shoot and root morphology, and dry mass accumulation were assessed to generate phenomic networks. The phenomic network became more complex under waterlogging as a result of the incorporation of root aerenchyma and dark‐adapted F v/ F m. Significant waterlogging‐induced variation was found for stomatal conductance, dark‐adapted F v/ F m and aerenchyma. The RILs with stronger induction of aerenchyma in response to waterlogging tended to show reduced negative impact of this stress on root growth but suffered average impact on shoot growth. The RILs that retained higher stomatal conductance under waterlogging tended to retain higher dark‐adapted F v/ F m and shoot growth under waterlogging conditions but showed average impact on root traits. We propose a model where, although the stress experienced by the roots during waterlogging is transmitted to the shoot, shoots and roots deal with waterlogging in a less interdependent manner than often assumed.