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United States Department of Agriculture

Agricultural Research Service

Title: Aerenchyma Development in Native Warm-Season Grass Cultivars

Authors
item Skinner, Robert
item Zobel, Richard
item Skaradek, William - USDA-NRCS

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: February 1, 2002
Publication Date: October 1, 2002
Citation: SKINNER, R.H., ZOBEL, R.W., SKARADEK, W. AERENCHYMA DEVELOPMENT IN NATIVE WARM-SEASON GRASS CULTIVARS. MEETING ABSTRACT. 2002.

Technical Abstract: The primary objective of this study was to determine the suitability of selected warm-season grass species/cultivars for use in riparian buffers where flooding can be expected. This study focused on the development of aerenchyma in the roots of plants placed under flooding compared with non-flooding conditions. One-year old plants from twenty six cultivars representing six native warm-season species (big bluestem, Andropogon gerardii, Vitman., 7 cultivars; little bluestem, Schizachyrium scoparium Michx., 1 cultivar; switchgrass, Panicum virgatum L., 10 cultivars; indiangrass, Sorghastrum nutans L., 5 cultivars; prairie cordgrass, Spartina pectinata L.,1 cultivar; and eastern gamagrass, Tripsacum dactyloides L., 2 cultivars) were transplanted into 15-cm diameter by 120-cm deep PVC pots and grown under well-drained or waterlogged conditions. After approximately 100 d, pots were opened and root samples collected for root length distribution and aerenchyma formation determinations. Aspects of aerenchyma development included percent of root cross sectional area as aerenchyma and whether the aerenchyma development was schizogenic (typical of constitutive aerenchyma) or lysigenic (characteristic of facultative aerenchyma which usually develop after stress initiation). The relationship between aerenchyma development and ability to extend roots into waterlogged soils will be discussed.

Last Modified: 11/24/2014
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