Soil type affects Pinus ponderosa var. scopulorum (Pinaceae) seedling growth in simulated drought experiments.

Autor: Lindsey AJ; Department of Horticulture and Crop Science, The Ohio State University, 2021 Coffey Road, Columbus, Ohio 43210 USA., Kilgore JS; Department of Biology, Washington & Jefferson College, 60 South Lincoln Street, Washington, Pennsylvania 15301 USA.
Jazyk: angličtina
Zdroj: Applications in plant sciences [Appl Plant Sci] 2013 Jul 29; Vol. 1 (8). Date of Electronic Publication: 2013 Jul 29 (Print Publication: 2013).
DOI: 10.3732/apps.1300031
Abstrakt: Premise of the Study: Effects of drought stress and media type interactions on growth of Pinus ponderosa var. scopulorum germinants were investigated. •
Methods and Results: Soil properties and growth responses under drought were compared across four growth media types: two native soils (dolomitic limestone and granite), a soil-less industry standard conifer medium, and a custom-mixed conifer medium. After 35 d of growth, the seedlings under drought stress (reduced watering) produced less shoot and root biomass than watered control seedlings. Organic media led to decreased root biomass, but increased root length and shoot biomass relative to the mineral soils. •
Conclusions: Media type affected root-to-shoot biomass partitioning of P. ponderosa var. scopulorum, which may influence net photosynthetic rates, growth, and long-term seedling survival. Further work should examine how specific soil properties like bulk density and organic matter influence biomass allocation in greenhouse studies.
Databáze: MEDLINE
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