全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
PLOS ONE  2014 

Dormancy-Related Seed Positional Effect in Two Populations of an Annual Grass from Locations of Contrasting Aridity

DOI: 10.1371/journal.pone.0093061

Full-Text   Cite this paper   Add to My Lib

Abstract:

In grasses, variation in seed size and dormancy often results from a seed's position within a dispersal unit. In this paper, I asked whether seed positional effect within a spikelet contributes to ecotypic differentiation between two populations of Avena sterilis having different species range position and associated aridity. I created experimental seed banks in which germination of seeds (florets) having different positions within a spikelet was examined over three years. In addition, two germination tests were conducted under controlled conditions. The two populations were found to have a short-living soil seed bank due to sequential germination of the florets. Although positional seed dormancy effect in A. sterilis does not appear to be a specific desert adaptation against unpredictability of rainfall events, this trait does contribute to ecotypic differentiation between desert and Mediterranean populations. Consistent with bet hedging buffering against rainfall unpredictability, germination fractions in the first year were higher in the Mediterranean than in the desert population, while seeds of the desert origin had stronger dormancy and more sequential germination of florets.

References

[1]  Baskin CC, Baskin JM (1998) Seeds: ecology, biogeography, and evolution of dormancy and germination: Academic Press. 666 p.
[2]  Childs DZ, Metcalf CJE, Rees M (2010) Evolutionary bet-hedging in the real world: empirical evidence and challenges revealed by plants. Proceedings of the Royal Society B - Biological Sciences 277: 3055–3064. doi: 10.1098/rspb.2010.0707
[3]  Imbert E (2002) Ecological consequences and ontogeny of seed heteromorphism. Perspectives in Plant Ecology Evolution and Systematics 5: 13–36. doi: 10.1078/1433-8319-00021
[4]  Campbell CS, Quinn JA, Cheplick GP, Bell TJ (1983) Cleistogamy in grasses. Annual Review of Ecology and Systematics 14: 411–441. doi: 10.1146/annurev.es.14.110183.002211
[5]  Schwendiman A, Shands HL (1943) Delayed germination or seed dormancy in Vicland oats. Agronomy Journal 35: 681–688. doi: 10.2134/agronj1943.00021962003500080004x
[6]  Gosling PG, Butler RA, Black M, Chapman JM (1981) The onset of germination ability in developing wheat. Journal of Experimental Botany 32: 621–627. doi: 10.1093/jxb/32.3.621
[7]  Adkins SW, Simpson GM (1988) The physiological basis of seed dormancy in Avena fatua. IX. Characterization of two dormancy states. Physiologia Plantarum 73: 15–20. doi: 10.1111/j.1399-3054.1988.tb09186.x
[8]  Simpson GM (1990) Seed dormancy in grasses. Cambridge, U.K: Cambridge University Press. 297 p.
[9]  Sugawara S (1959) Studies on the germination capacity of upland rice seeds in relation to the location on the flower panicle. Bulletin of the Faculty of Agriculture of Niigata University 11: 9–22.
[10]  Phaneendranath BR, Duell RW, Funk CR (1978) Dormancy of Kentucky bluegrass seed in relation to the color of spikelets and panicle branches at harvest. Crop Science 18: 683–684.
[11]  Horovitz A. The soil seed bank of wild emmer. In: Zencirci N, Kaya Z, Anikster Y, Adams WT, editors; 1998. Central Research Institute for Field Crops, Ankara, Turkey. pp. 185–188.
[12]  Wang AB, Tan DY, Baskin CC, Baskin JM (2010) Effect of seed position in spikelet on life history of Eremopyrum distans (Poaceae) from the cold desert of north-west China. Annals of Botany doi: 10.1093/aob/mcq089.
[13]  Johnson LPV (1935) General preliminary studies on the physiology of delayed germination in Avena fatua. Canadian Journal of Research Section C 13: 283–300. doi: 10.1139/cjr35c-021
[14]  Dyer AR (2004) Maternal and sibling factors induce dormancy in dimorphic seed pairs of Aegilops triuncialis. Plant Ecology 172: 211–218. doi: 10.1023/b:vege.0000026339.61069.33
[15]  Adkins SW, Loewen M, Symons SJ (1986) Variation within pure lines of wild oats (Avena fatua) in relation to degree of primary dormancy. Weed Science 34: 859–864.
[16]  Adkins SW, Loewen M, Symons SJ (1987) Variation within pure lines of wild oats (Avena fatua) in relation to temperature of development. Weed Science 35: 169–172.
[17]  Evans MEK, Dennehy JJ (2005) Germ banking: bet-hedging and variable release from egg and seed dormancy. The Quarterly Review of Biology 80: 431–451. doi: 10.1086/498282
[18]  Kalisz S, McPeek MA (1992) Demography of an age-structured annual - resampled projection matrices, elasticity analyses, and seed bank effects. Ecology 73: 1082–1093. doi: 10.2307/1940182
[19]  Volis S, Mendlinger S, Ward D (2004) Demography and role of the seed bank in Mediterranean and desert populations of wild barley, Hordeum spontaneum Koch. Basic and Applied Ecology 5: 53–64. doi: 10.1078/1439-1791-00192
[20]  Orzack SH, Tuljapurkar S (1989) Population dynamics in variable environments. VII. The demography and evolution of iteroparity. American Naturalist 133: 901–923. doi: 10.1086/284959
[21]  Tuljapurkar S, Wiener P (2000) Escape in time: stay young or age gracefully? Ecological Modelling 133: 143–159. doi: 10.1016/s0304-3800(00)00288-x
[22]  St?ecklin J, Fischer M (1999) Plants with longer-lived seeds have lower local extinction rates in grassland remnants 1950–1985. Oecologia 120: 539–543. doi: 10.1007/s004420050888
[23]  Pake CE, Venable DL (1996) Seed banks in desert annuals: Implications for persistence and coexistence in variable environments. Ecology 77: 1427–1435. doi: 10.2307/2265540
[24]  Evans ME, Ferriere R, Kane MJ, Venable DL (2007) Bet hedging via seed banking in desert evening primroses (Oenothera, Onagraceae): demographic evidence from natural populations. American Naturalist 169: 184–194. doi: 10.1086/510599
[25]  Cohen D (1966) Optimizing reproduction in a randomly varying environment. Journal of Theoretical Biology 12: 119–129. doi: 10.1016/0022-5193(66)90188-3
[26]  Valleriani A (2006) Evolutionarily stable germination strategies with time-correlated yield Theoretical Population Biology. 70: 255–261. doi: 10.1016/j.tpb.2006.07.008
[27]  Polis GA (1995) Desert communities: an overview of patterns and processes. In: Polis GA, editor. The ecology of desert communities: University of Arizona Press. pp. 1–26.
[28]  Shmida A, Burgess T (1988) Plant growth-form strategies and vegetation types in arid environments. In: Werger MJA, van der Aart PJM, During HJ, Verhoeven JTA, editors. Plant form and vegetation structure. Hague: SPB Academic. pp. 211–242.
[29]  Zohary D (1983) Wild genetic resources of crops in Israel. Israel Journal of Botany 32: 97–127.
[30]  Sanchez Del Arco MJ, Torner C, Fernandez Quintanilla C (1995) Seed dynamics in populations of Avena sterilis ssp. ludoviciana. Weed Research: 477–487.
[31]  StatSoft Inc. (2004) STATISTICA (data analysis software system), version 7. www.statsoft.com.
[32]  Tevis L (1958) Germination and growth of ephemerals induced by sprinkling a sandy desert. Ecology 39: 681–688. doi: 10.2307/1931608
[33]  Beatley JC (1967) Survival of winter annuals in northern Mojave Desert. Ecology 48: 745–750. doi: 10.2307/1933732
[34]  Inouye RS (1991) Population biology of desert annual plants. In: Polis G, editor. The ecology of desert communities. Tucson: The University of Arizona Press pp. 27–54.
[35]  Venable DL, Pake CE (1999) Population ecology of Sonoran desert annual plants. In: Robichaux RH, editor. The ecology of Sonoran Desert plants and plant communities. Tuscon, Arizona: University of Arizona Press. pp. 115–142.
[36]  Freas KE, Kemp PR (1983 ) Some relationships between environmental reliability and seed dormancy in desert annual plants. Journal of Ecology 71: 211–217. doi: 10.2307/2259973
[37]  Gutterman Y, Gozlan S (1998) Amounts of winter or summer rain triggering germination and 'the point of no return' of seedling desiccation tolerance, of some Hordeum spontaneum local ecotypes in Israel. Plant and Soil 204: 223–234. doi: 10.1007/978-94-011-4830-6_25
[38]  Pitt MD, Heady HF (1978) Responses of annual vegetation to temperature and rainfall patterns in northern California. Ecology. 59: 336–350. doi: 10.2307/1936378
[39]  Volis S (2012) Demographic consequences of delayed germination in two annual grasses from two locations of contrasting aridity. Perspectives in Plant Ecology, Evolution and Systematics 14: 335–340. doi: 10.1016/j.ppees.2012.07.002
[40]  Wurzburger J, Leshem Y, Koller D (1976) Correlative aspects of imposition of dormancy in caryopses of Aegilops kotschyi. Plant Physiology 57: 670–671. doi: 10.1104/pp.57.4.670

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133