Skip to main content Accessibility help
×
Home

Seed development in the recalcitrant species Quercus robur L.: germinability and desiccation tolerance

  • W. E. Finch-Savage (a1)

Abstract

Changes in germination and desiccation sensitivity were measured throughout the seed expansion phase of development in fruits of Quercus robur L. The onset of a reduction in sensitivity to desiccation during development on the tree coincided with acquisition of the capacity for seed germination on moist sand substrate. Tolerance of desiccation then increased throughout development to shedding, but viability was still lost at a relatively high moisture content, and seeds did not therefore pass through a fully desiccation-tolerant phase. These data suggest that desiccation sensitivity in Q. robur may have resulted from the premature termination of development.

No desiccation was required to initiate germination in prematurely harvested fruits orseeds. Germination rate of seeds on moist sand increased at successive harvests during development, and was also increased by presoaking seeds in water. Variation in germination rate following shedding was not related to seed size or moisture content, but was affected by shedding date. This effect was not observed when the pericarp was removed.

Copyright

References

Hide All
Berjak, P., Dini, M. and Pammenter, N.W. (1984) Possible mechanismsunderlying the differing dehydration responses in recalcitrant and orthodox seeds: desiccation-associated subcellular changes in propagules of Avicennia marina. Seed Science and Technology 12, 365384.
Ellis, R.H., Hong, T.D. and Roberts, E.H. (1990) An intermediate category of seed storage behaviour? II. Coffee. Journal of Experimental Botany 41, 11671174.
Farrant, J.M., Berjak, P. and Pammenter, N.W. (1985) The effectof drying rate on viability retention of recalcitrant propagules of Avicennia marina. South African Journal of Botany 51, 432438.
Farrant, J.M., Pammenter, N.W. and Berjak, P. (1986) The increasing desiccation sensitivity of recalcitrant Avicennia marina seeds with storage time. Physiologia Plantarum 67, 291298.
Finch-Savage, W.E. (in press) Embryo water status and survival in the recalcitrant species Quercus robur L evidence for a critical moisture content. Journal of Experimental Botany.
Finch-Savage, W.E., Clay, H.A., Blake, P.S. and Browning, G. (In press) Seed development in the recalcitrant species Quercus robur L. Changing water status and endogenous abscisic acid levels. Journal of Experimental Botany.
Fischer, W., Bergfeld, R., Plachy, C., Schäfer, R. and Schopfer, P. (1988) Accumulation of storage materials, precocious germination and development of desiccation tolerance during seed maturation in mustard (Sinapis alba L.). Botanica Acta 101, 344354.
Hong, T.D. and Ellis, R.H. (1990) A comparison of maturation drying, germination, and desiccation tolerance between developing seeds of Acer pseudoplatanus L and Acer platanoides L. New Phytologist 116, 589596.
International Seed Testing Association (1985) International rules for seed testing. Determination of moisture content. Seed Science and Technology 13, 338341.
Kermode, A.R. and Bewley, J.D. (1985) The role of maturation drying in the transition from seed development to germination. Journal of Experimental Botany 36, 19061915.
Kermode, A.R. and Bewley, J.D. (1989) Developing seeds of Ricinus communis L., when detached and maintained in an atmosphere of high relative humidity, switch to a germinative mode without the requirement for complete desiccation. Plant Physiology 90, 702707.
Kermode, A.R., Bewley, J.D., Dasgupta, J. and Misra, S. (1986) The transition from seed development to germination: a key role for desiccation? HortScience 21, 11131118.
Nautiyal, A.R. and Purohit, A.N. (1985) Seed viability in Sal. I. Physiological and biochemical aspects of seed development I Shorea robusta. Seed Science and Technology 13, 5968.
Prevost, I. and Le Page-Degivry, M. Th. (1985) Inverse correlation between ABA content and germinability throughout the maturation and in vitro culture of the embryo of Phaseolus vulgaris. Journal of Experimental Botany 36, 14571464.
Pritchard, H.W. and Manger, K.R. (1990) Quantal response of fruit and seed germination rate in Quercus robur L. and Castanea sativa Mill. to constant temperatures and photon dose. Journal of Experimental Botany 41, 15491557.
Probert, R.J. and Brierley, E.R. (1989) Desiccation intolerance in seeds of Zizania palustris is not related to developmental age or the duration of post-harvest storage. Annals of Botany 64, 669674.
Roberts, E.H. (1973) Predicting the storage life of seeds. Seed Science and Technology 1, 499514.
Schopfer, P. and Plachy, C. (1985) Control of seed germination by abscisic acid. III. Effect on embryo growth potential (minimum turgor pressure) and growth coefficient (cell wall extensibility) in Brassica napus L. Plant Physiology 77, 676686.
Villiers, T.A. (1974) Seed aging: chromosomal stability and extended viability of seeds stored fully imbibed. Plant Physiology 53, 875878.

Keywords

Seed development in the recalcitrant species Quercus robur L.: germinability and desiccation tolerance

  • W. E. Finch-Savage (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed