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Recent advances in guayule parthenium argentatum seed germination procedures


, : Recent advances in guayule parthenium argentatum seed germination procedures. Crop Science 20(4): 501-504

Guayule (P. argentatum Gray), a xerophytic shrub native to northeastern Mexico and southern Texas [USA], is receiving renewed attention as a potential source of natural rubber in the semiarid regions of the world. A major problem in propagating guayule is seed dormancy. The objectives of this investigation were to evaluate and modify old seed treatment methods and to develop an improved standard procedure for quick and complete germination of guayule seeds to enhance breeding and improvement of the crop. The optimum concentration of NaOCl needed for breaking seed dormancy was higher for younger than older seeds. Seeds should be washed and soaked in distilled water for 8 h followed by a 2-h treatment with a solution of equal parts of GA (200 ppm) and NaOCl (1.0% for fresh seeds, and 0.25% for 1-yr-old seeds). With this procedure freshly harvested seeds germinated 100% under light and over 70% in complete darkness. Emergence of seedlings from soil depended primarily upon seed size. Large guayule seeds emerged better at all depths to 18 mm after standard treatment than did medium or small seeds.


Accession: 006269153

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Related references

Naqvi H.H.; Hanson G.P., 1982: Germination and growth inhibitors in guayule parthenium argentatum chaff and their possible influence in seed dormancy. Guayule (P. argentatum Gray) is a rubber-producing plant native to the semi-arid region of north central Mexico and southwestern Texas [USA]. As a member of the family Asteraceace, the seed dispersal unit in guayule is comprised of an achene enclo...

Naqvi, H.H.; Hanson, G.P., 1982: Germination and growth inhibitors in guayule (Parthenium argentatum Gray) chaff and their possible influence in seed dormancy. The seed dispersal unit in guayule comprises an achene enclosed by two staminate florets and a bract. The seeds are dormant and need special treatment in order to germinate. Bioassays of aqueous extracts of guayule, lettuce and tomato seed, and hi...

Naqvi, H.H.; Hanson, G.P., 1980: Recent advances in guayule seed germination procedures. An improved procedure, giving 100% germination in light and over 70% in complete darkness for seeds of Parthenium argentatum, is described. Seeds are washed and soaked in distilled water for 8 h followed by a 2 h treatment with a solution of equal...

Hurly R.F.; Van Staden J.; Smith M.T., 1989: Guayule parthenium argentatum gray seed germination the effect of water soaks sodium hypochlorite gibberellic acid and gibberellin 4 7 applied as seed pre treatments. Sequential treatments consisiting of a water soak, following by application of sodium hypochlorite solution in conjuction with gibberellic acids (GA3 or GA4/7), or promalin (benzyladenine and GA4/7), were tested in order to determine optimum condi...

Patel K.N.; Kumari A.; Rao S.N.; Iyengar E.R.R., 1991: Effect of chemicals on germination of guayule parthenium argentatum. The seed germination in guayule (Parthenium argentatum Gray) is low due to dormancy imparted by the presence of inhibitors in the glumes attached to seeds. This is more especially in freshly harvested seeds. An effort was made to break the dormanc...

Bafna, M.K.mar, A., 1983: Studies on germination and growth of guayule (Parthenium argentatum) yielding rubber. Advancing frontiers plant sciences 1983: symposium proceedings National Symposium on Advancing Frontiers of Plant Sciences Jodhpur November 26-30-1983 edited by HC Arya et al

Miyamoto S.; Sosnovske K.; Tipton J., 1982: Salt and water stress effects on germination of guayule parthenium argentatum seeds. The test materials included 4 USDA selections (11646, 11604, 11633 and A48118) and 1 cultivar (593). Petri dish solution cultures were used for evaluating salt effects, and 2 sandy soils (Typic Torrifluvents and Typic Torripsamments) placed in pet...

Hurly R.F.; Van Staden J., 1989: A comparison of seed sorting methods used for guayule parthenium argentatum gray seed separation. To optimise germination of guayule (Parthenium argentatum) seed an efficient method of seed sorting is essential. This can be achieved by hand sorting on the basis of seed colour and size. Both methods are laborious but in view of a limited seed s...

Banigan T.F.; Verbiscar A.J.; Weber C.W., 1982: Composition of guayule parthenium argentatum leaves seed and wood. Major components of guayule leaf, seed and woody tissue were assayed, with nutritional aspects primarily in mind. Crude protein in the deoiled seed meal was .apprx. 39%, while deresinated derubberized leaf and wood tissue showed 14-18%. The amino...

Mamood A.N.; Ray D.T.; Waller G.D., 1990: Seed set in guayule parthenium argentatum asteraceae in relation to insect pollination. Guayule (Parthenium argentatum, Asteraceae) is one of two major plant species grown for natural rubber. Studies were conducted to determine the effect of honey bee (Apis mellifera) pollination and season on seed set and total seed yield/ha. The ex...