Grassland grasses use opposite strategies to cope with low phosphorus
Farias J, Marques ACR, de Oliveira LB, Knebel Del Frari B, Schwalbert R
Native Plants
If you're restoring a native prairie or meadow, picking grass species that actually match your soil's fertility, rather than assuming all grasses respond to fertilizer the same way, can make the difference between a planting that thrives and one that struggles.
Researchers figured out a quick way to grow lots of identical baby grass plants from just a few parent plants, using simple cuttings instead of complicated lab techniques. They then tested three native South American grasses with different amounts of phosphorus in the soil and found the grasses split into two camps: one species grows fast and gobbles up extra phosphorus when it's available, while another barely changes its growth but gets by efficiently even when phosphorus is scarce.
Key Findings
A tiller-based propagation protocol produced up to 1197.9 viable plantlets per parent plant in Axonopus affinis, versus 131.4 in Paspalum notatum and 39.4 in Andropogon lateralis
Paspalum notatum showed strong biomass and leaf phosphorus gains under high phosphorus, plus reduced phosphatase activity, marking it as a resource-acquisitive species
Andropogon lateralis showed little growth response to added phosphorus but maintained high phosphorus-use efficiency under low-phosphorus conditions, marking it as resource-conservative
chevron_right Technical Summary
Scientists developed a fast, reliable way to clone native South American grasses for research, then used it to show that different grasses have completely different strategies for using phosphorus, a nutrient often scarce in soil.
Abstract Preview
Original paper
Ex vitro standardization enables evaluation of phosphorus-use strategies in Pampa biome grasses.
Native grasses of the Pampa biome are essential for ecosystem functioning and restoration, yet understanding of how native species respond to nutrient availability remains limited by challenges in ...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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Paspalum notatum, known commonly as bahiagrass, common bahia, and Pensacola bahia, is a tropical to subtropical perennial grass. It is known for its prominent V-shaped inflorescence consisting of two spike-like racemes containing multiple tiny spikelets, each about 2.8–3.5 millimetres (0.11–0.14 ...