) attribute grape seed dormancy to a water-soluble inhibitor, most likely abscisic acid, which can be removed with leaching by running water. The goal of this study was to test various seed treatments in an attempt to improve overall germination rates of
air dryer for 90 min and then stored in hermetic plastic bags at 20 °C until evaluation. Fig. 1. General outline of light seed treatment. Inside the container, lettuce seeds reached an equilibrium water content of 16%. Light was provided by red (660 nm
A compressed air gel seeding system was developed to sow simultaneously several rows with different seed treatments. A technique to plant vegetable seeds at equidistant spacings using a solenoid valve and photoelectric device is described.
an economical and practical seed treatment alternative for enhancing tanglehead seed germination. Because tanglehead is a fire-adapted species ( Goergen and Daehler, 2001 ), it is assumed that smoke applications may improve the germination of dormant
been used to propagate and conserve this species. The aim of this study was to develop in vitro propagation methods for D. ombet to conserve this critically endangered species. Materials and Methods Plant material, seed treatment and in vitro culture
seedlings from treatment groups: green seed (GS) 2 at 10 weeks after pollination (WAP), GS3 at 15 WAP, GS4 at 20 WAP, dry seed (DS) 1 at 20 WAP, and DS2 at 20 WAP after a 10-week stratification period. Seedlings in each seed treatment group represent the
and 7 d) than untreated seeds. GA is a common hormonal priming agent used for seed treatment due to this hormone’s capacity to break seed dormancy, induce germination, and regulate metabolic activities that induce cotyledon development ( Khan, 1968
the cultivar. Chromosome doubling studies Seed treatment with colchicine. Seeds were pretreated by soaking in an aqueous solution of 0.1% (v/v) Triton ® X-100 (Integra Chemical, Renton, WA) for 24 h on a rotary shaker (model G-33; New
Seeds of tomato (Lycopersicon esculentum Mill.) and pepper (Capsicum annuum L.) were either germinated before planting, primed (immersed in an aerated solution of potassium phosphate and ammonium phosphate for 72 hours (tomato) or 120 hours (pepper) and dried), or left untreated (raw) and then planted with gel in loamy sand and sandy soils. There was little difference in response from the tomato seed treatments. In pepper, germinated seeds emerged much earlier and established heavier plants. Differences in emergence due to seed treatments generally were greater in loamy sand than in sandy soil.
Primed, pregerminated, or nontreated seeds of bell pepper (Capsicum annum L.) `Early California Wonder' were grown in controlled conditions for 14 days in glass tubes containing a gel medium. The number of basal roots (one per plant), lateral roots (one per plant), and taproot length (64 mm) did not differ between seed treatments 14 days after seeding. Roots of seedlings from nontreated seeds weighed more than seedlings from primed seeds, and the seedlings had smaller shoot: root ratios than those from pregerminated or primed seeds. Seedlings from pregerminated seeds had heavier and taller shoots than seedlings from nontreated or primed seeds. Taproot length from 1 to 6 days after radicle protrusion increased linearly for all seed treatments. Seedlings from pregerminated seeds initially had longer taproots but had slower linear taproot growth up to 6 days after seeding than seedlings from nontreated or primed seeds.