Physiological responses of apricot plants grafted on two different rootstocks to flooding conditions
Research Group
Grupo de investigación Suelo-agua-plantaKnowledge Area
Producción VegetalSponsors
The authors are grateful to Dr Pedro Rodriguez from INCA (La Habana, Cuba) for help with the root hydraulic conductivity measurements. The study was supported by CICYT (HID1999-0951; AGL2000-0387-C05-04) grants to the authors.Publication date
2000-02Publisher
Grupo de investigación Suelo-agua-plantaBibliographic Citation
DOMINGO, R., PÉREZ PASTOR, A., RUIZ SÁNCHEZ, M.C. Physiological responses of apricot plants grafted on two different rootstocks to flooding conditions. Journal of Plant Physiology, 159 (7): 725-732, 2000. ISSN 0176-1617Keywords
Flooding stressGas exchange
Prunus armeniaca
Water relations
Estrés por inundación
Intercambio de gas
Relaciones hídricas
Abstract
The effects of soil flooding on plant water relations and vegetative growth was
studied in potted two-year-old apricot plants (Prunus armeniaca L., cv. Búlida)
grafted on two different rootstocks: Pollizo prune (P. insititia L.) (P) and Real
Fino apricot (RF). Plants were submitted outdoors to three treatments: T0, not
flooded (control), and two flooded treatments for 3 (T1) and 6 (T2) days.
Apricot water relations were seen to be adversely affected from first day of the
flooding onwards. These effects were more pronounced in Búlida/RF than in
Búlida/P plants. The T1 plants developed an early stomatal regulation
(decrease in leaf conductance (gl)), which prevented leaf tissue dehydration,
together with decrease in net photosynthesis (Pn) and the increase in resistance
to water flow (R(p+s)). This early gl and Pn response suggests that porometric
and/or photosynthetic changes are reliable bio-indicators of the altered
behaviour caused by flooding in apricot plants. The lowest ...
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