Effect of Humidity, Temperature, and Scarification during Storage on Seed Germination of Lupinus havardii and L. texensis

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  • 1 1Dept. of Agronomy and Horticulture, New Mexico State Univ., Box 30003, Dept. 3Q, Las Cruces, NM 88003-0003
  • 2 2Texas A&M Univ. Research and Extension Center, 1380 A&M Circle, El Paso, TX 79927

Lupinus havardii and L. texensis are two commercially important species of lupines (bluebonnets) in Texas. There is no current information for the storage requirements of these two bluebonnet species seeds. A study was undertaken to examine the effects of relative humidity, temperature, and scarification on seed germinability. Seeds of the two bluebonnet species were stored under five relative humidity treatments (11%, 23%, 52%, 75%, and 95%) and two temperature treatments (3°C or 22°C) either scarified or nonscarified in factorial combination. Seed samples were removed monthly. Nonscarified seed were scarified and all seed were placed in a seed germination chamber and germinated in petri dishes containing moistened filter paper. All samples of seed stored under 95% relative humidity were lost to seed-borne contamination. Germinability of scarified seed of both species decreased within 5 months in the 22°C/75% RH treatment. Other treatments had no effect on germinability during 7 months of seed storage.

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