Publication Date
1985
Location
Kyoto Japan
Description
Green needlegrass is commonly used in range seedings in the northern Great Plains in the United States (U.S.). Because of its potential as a revegetation species a series of experiments were conducted to determine 1) germination requirements; 2) capacity of seedlings for emergence and root growth following dehydration; and 3) influence of planting depth, seed source and temperature on seedling emergence and morphology. A variety of sources of green needle grass seed were used in growth chamber experiments following standard procedures. The results indicated that optimum temperatures for green needlegrass germination were 20°C (constant) and 20-15°C (16 hour-8 hour alteration) with constant darkness following treatments of either prechilling, gibberellic acid, or removal of the lemma and palea. Temporary dehydration experiments revealed that germinating seeds of green needlegrass have relatively low tolerance to dehydration possibly as a result of a low latent potential for development of seminal lateral roots and low tolerance of the embryo and developing tissues to dehydration. The effects of planting depth indicated that green needlegrass should not be planted at depths greater than 3.0 cm because of low percent emergence, rate of emergence and poor root development when seedlings emerged from greater depths. The findings from these studies has provided critical information that can be used in developing specific guidelines for the successful establishment of green needlegrass under range seedings.
Citation
Redentre, Edward F. and Fulbright, Timothy E., "Physiological Characteristics of Green Needlegrass (Stipa viridula Trin.)" (1985). IGC Proceedings (1985-2023). 36.
(URL: https://uknowledge.uky.edu/igc/1985/ses3/36)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Physiological Characteristics of Green Needlegrass (Stipa viridula Trin.)
Kyoto Japan
Green needlegrass is commonly used in range seedings in the northern Great Plains in the United States (U.S.). Because of its potential as a revegetation species a series of experiments were conducted to determine 1) germination requirements; 2) capacity of seedlings for emergence and root growth following dehydration; and 3) influence of planting depth, seed source and temperature on seedling emergence and morphology. A variety of sources of green needle grass seed were used in growth chamber experiments following standard procedures. The results indicated that optimum temperatures for green needlegrass germination were 20°C (constant) and 20-15°C (16 hour-8 hour alteration) with constant darkness following treatments of either prechilling, gibberellic acid, or removal of the lemma and palea. Temporary dehydration experiments revealed that germinating seeds of green needlegrass have relatively low tolerance to dehydration possibly as a result of a low latent potential for development of seminal lateral roots and low tolerance of the embryo and developing tissues to dehydration. The effects of planting depth indicated that green needlegrass should not be planted at depths greater than 3.0 cm because of low percent emergence, rate of emergence and poor root development when seedlings emerged from greater depths. The findings from these studies has provided critical information that can be used in developing specific guidelines for the successful establishment of green needlegrass under range seedings.
