Abstract
Rhizome and tiller development of ungrazed switchgrass (Panicum virgatum L.), prairie sandreed [Calamolvilfa longifolia (Hook) Scribn.], and sand bluestem [Andropogon gerardii var. paucipilus (Nash) Fern.] were studied for two years in the Nebraska Sandhills. Rhizome growth of switchgrass began at the 4- to 5-leaf stage. Following tiller elongation, no new rhizomes developed but rhizome elongation continued. Many of the prairie sandreed tillers were biennial similar to those of indiangrass [Sorghastrum nutans (L.) Nash]. Spring tiller development on prairie sandreed came from both vertical and horizontal rhizomes and continuing growth of late emerging tillers from the previous year. New rhizomes began growth at the 4- to 5-leaf stage. Prairie sandreed was the only grass to have rhizomes deeper than 10 cm. In sand bluestem, buds on rhizomes that were underneath the previous year's tiller lived over winter. In the spring after a tiller emerged through the soil and reached the 4- to 5-leaf stage meristematic tissue below the shoot apex elongated forming a rhizome which pushed the shoot apex to the soil surface. The newly formed rhizome initiated buds which served as the site of the following year's tiller development. Normal tiller elongation and inflorescence formation occurred later in the season. Prairie sandreed and sand bluestem are adapted to sand burial while switchgrass requires a more stable soil.
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Claims 13
Claim · model-written summary
Switchgrass rhizome growth began at the 4- to 5-leaf stage.
- Taxon
- switchgrass
Panicum virgatume0 - Organ / stage
- 4- to 5-leaf stagee0
- Outcome
- Rhizome growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhizome growth of switchgrass began at the 4- to 5-leaf stage.”
Claim · model-written summary
After tiller elongation, switchgrass formed no new rhizomes while existing rhizomes continued elongating.
- Taxon
- switchgrassPanicum virgatume1
- Organ / stage
- tiller elongatione0
- Outcome
- no new rhizomes developed but rhizome elongation continuede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Following tiller elongation, no new rhizomes developed but rhizome elongation continued.”
e1“Rhizome growth of switchgrass began”
Claim · model-written summary
Many prairie sandreed tillers were biennial.
Verbatim
e0“Many of the prairie sandreed tillers were biennial similar to those of indiangrass”
Claim · model-written summary
Spring prairie sandreed tillers arose from vertical and horizontal rhizomes and prior-year late tillers.
Verbatim
e0“Spring tiller development on prairie sandreed came from both vertical and horizontal rhizomes and continuing growth of late emerging tillers from the previous year.”
Claim · model-written summary
New prairie sandreed rhizomes began growth at the 4- to 5-leaf stage.
Verbatim
e0“New rhizomes began growth at the 4- to 5-leaf stage.”
e1“Spring tiller development on prairie sandreed”
Claim · model-written summary
Prairie sandreed alone had rhizomes deeper than 10 cm.
Verbatim
e0“Prairie sandreed was the only grass to have rhizomes deeper than 10 cm.”
Claim · model-written summary
In sand bluestem, buds beneath the previous-year tiller survived winter.
Verbatim
e0“In sand bluestem, buds on rhizomes that were underneath the previous year's tiller lived over winter.”
Claim · model-written summary
Sand bluestem rhizomes formed when tissue below the shoot apex elongated at the 4- to 5-leaf stage.
Verbatim
e0“In the spring after a tiller emerged through the soil and reached the 4- to 5-leaf stage meristematic tissue below the shoot apex elongated forming a rhizome which pushed the shoot apex to the soil surface.”
e1“In sand bluestem, buds”
Claim · model-written summary
New sand bluestem rhizomes initiated buds that supported the following year’s tillers.
Verbatim
e0“The newly formed rhizome initiated buds which served as the site of the following year's tiller development.”
e1“In sand bluestem, buds”
Claim · model-written summary
Sand bluestem tillers elongated and formed inflorescences later in the season.
Verbatim
e0“Normal tiller elongation and inflorescence formation occurred later in the season.”
e1“In sand bluestem, buds”
Claim · model-written summary
Prairie sandreed was described as adapted to sand burial.
Verbatim
e0“Prairie sandreed and sand bluestem are adapted to sand burial while switchgrass requires a more stable soil.”
Claim · model-written summary
Sand bluestem was described as adapted to sand burial.
Verbatim
e0“Prairie sandreed and sand bluestem are adapted to sand burial while switchgrass requires a more stable soil.”
Claim · model-written summary
Switchgrass was described as requiring more stable soil.
- Taxon
- switchgrassPanicum virgatume0
- Outcome
- requires a more stable soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prairie sandreed and sand bluestem are adapted to sand burial while switchgrass requires a more stable soil.”