English papers
95.   Nakano, S., Oguro, M., Itagaki T., and Sakai, S. (2020) Florivory defence: are phenolic compounds distributed differently within perianths?. Biological Journal of the Linnean Society 131:12-25.

94.   Sakai, S. (2020) Maintenance of high inbreeding depression in selfing populations: two-stage effect of early- and late-acting mutations. Journal of theorecial Biology Article 110307.

93.   Aoyagi Blue, Y. and Sakai, S. (2020) Low mutation rates promote the evolution of advantageous traits by preventing interference from deleterious mutations. Genetica 148:101–108.

92.   Itagaki, T., Misaki, A., and Sakai, S. (2020) Selection for floral integration and trait variation in zygomorphic flowers of Aconitum japonicum ssp. subcuneatum (Ranunculaceae). Plant Ecology 221:347–359.

91.  Furukawa, T., Itagaki, T., Murakoshi, N., and Sakai, S. (2020) Inherited dimorphism in cleistogamous flower production in Portulaca oleracea: comparison of 16 populations growing under different environmental conditions. Annals of Botany 125:423-431.

90.  Mochizuki, J., Itagaki, T., Aoyagi Blue, Y., Ito, M., and Sakai, S. (2019) Ovule and seed production patterns in relation to flower size variations in actinomorphic and zygomorphic flower species. AoB Plants 11: plz061; doi: 10.1093/aobpla/plz061.

89.  Itagaki, T., Mochizuki, J., Aoyagi Blue, Y., Ito, M., and Sakai, S. (2019) Evolution towards minimum ovule size? Ovule size variations and the relative sizes of ovules. Annals of Botany 1253-1256.

 88.  Wakabayashi, K., Oguro, M., Itagaki, T., and Sakai, S. (2018) Floral induced and constitutive defense against florivory: comparison of chemical traits in 12 herb species. Plant Ecology 219:985-997.

87.  Misaki, A., Itagaki, T., Matsubara, Y., and Sakai, S. (2018) Intra-flower variation in nectar secretion: secretion patterns
and pollinator behavior in male- and female-phase flowers. American Journal of Botany 105:842-850.

86. Matsuhashi, S., Kudoh, H., Maki, M., Cartolano, M., Tsiantis, M., Itagaki, T., and Sakai, S.  (2016) Invasion history of Cardamine hirsuta in Japan inferred from genetic analyses of herbarium specimens and current populations.  Biological  Invasions 18:1939-1951.

 85. Sakai, S.  (2016) How have self-incompatibility haplotypes diversified? Generation of new haplotypes during the evolution of self-incompatibility from self-compatibility.  American Naturalist 188:163-174.

84. Itagaki, T., Kimura, M. K., Maki, M. and Sakai, S.  (2016) Differential self-fertilization rates in response to variation in floral traits within inflorescences of Aquilegia buergeriana var. oxysepala (Ranunculaceae).  Botanical Journal of the Linnean Society 181:294-304.

83. Oka, C., Itagaki, T., and Sakai, S.  (2016) Effect of the number of embryos in a seed and of seed size on seedling emergence and growth in polyembryonic Ophiopogon japonicus var. umbrosus (Asparagaceae).  Botany 94:261-268.

82. Matsubara, Y. and Sakai, S.  (2016) The role of flood regime on invasive success of exotic species growing in riparian environments.  Biological Invasions 18: 793-808.

81. Fusato, Y., Itagaki, T., Oguro, M., and Sakai, S.  (2015) Effect of change in floral openness with floral age on floral display and reproduction in Gentiana.  Acta Oecologica 67:17-23.

80. Itagaki, T., Kimura, M. K., Lian, L., and Sakai, S. (2015) Development of microsatellite markers for Aquilegia buergeriana var. oxysepala (Ranunculaceae), a vulnerable Japanese herb.  Plant Species Biology 30:159-162.

79. Oguro, M. and Sakai, S.  (2015) Relation between flower head traits and florivory in Asteraceae: A phylogenetically controlled approach.  American Journal of Botany 102:407-416.

78. Onodera, H., Oguro, M., and Sakai, S.  (2014) Effects of nutrient contents and defense compounds on herbivory in reproductive organs and leaves of Iris gracilipes.  Plant Ecology 215:1025-1035.

 77. Sakai, S. and Wakoh, H.  (2014) Initial invasion of gametophytic self-incompatibility alleles in the absence of tight linkage between pollen and pistil S alleles.  American Naturalist 184:248-257.

76. Oguro, M. and Sakai, S. (2014) Difference in defense strategy in flower heads and leaves of Asteraceae: multiple species approach.  Oecologia 174:227-239.

75. Sakai, S. (2013) Evolutionarily stable size of a megagametophyte: evolution of tiny megagametophytes of angiosperms from large ones of gymnosperms.  Evolution 67:539-547.

74. Matsuhashi, S., Sakai, S., and Kudo, H.  (2012) Temperature-dependent fluctuation of stamen number in Cardamine hirsuta (Brassicaceae).  International Journal of Plant Sciences 173:391-398.

73. Sakai, S. (2011) Evolution of exalbuminous seeds as a result of competition between maternally-derived and paternally-derived genes.  Evolutionary Ecology Research 12:855-871.

72. Sakai, S. (2010) With whom is the gene in conflict in offspring production?: synthesis of the theories of intragenomic and parent-offspring conflict.  Journal of theoretical Biology 266:367-373.

71. Inoue, M. N., Makino, T. T., Yokoyama, J., and Sakai, S. (2010) Is Bombus terrestris (Hymenoptera: Apidae) a stronger competitor against native species?: a comparison of foraging efficiency. Applied Entomology and Zoology 45:71-75.

70. Ito, K. and Sakai, S. (2009) Optimal defense strategy against herbivory in plants: Conditions selecting for induced defense, constitutive defense, and no-defense. Journal of theoretical Biology 260:453-459.

69. Sakai, S. and Kojima, T. (2009) Overproduction and selective abortion of ovules based on the order of fertilization revisited. Journal of theoretical Biology 260:430-437.

68. Oguro, M. and Sakai, S. (2009) Floral herbivory at different stages of flower development changes reproduction in Iris gracilipes (Iridaceae). Plant Ecology 202:221-234.

67. Morinaga, S.-I., Kumano, Y., Ota, A., Yamaoka, R., and Sakai, S. (2009) Day-night fluctuations in floral scent and their effects on reproductive success in Lilium auratum. Population Ecology 51:187-195

66. Morinaga, S.-I., Nagano, A. J, Miyazaki, S. , Kubo, M., Demura, T., Fukuda, H., Sakai, S., and Hasebe, M. (2008)  Ecogenomics of cleistogamous and chasmogamous flowering: genome-wide gene expression patterns from cross-species microarray analysis in Cardamine kokaiensis (Brassicaceae).  Joural of Ecology 96:1086-1097.

65. Kato, S. and Sakai, S. (2008)  Nectar secretion strategy in three Japanese species: changes in nectar volume and sugar concentration dependent on flower age and flowering order.  Botany 86:337-345.

64. Sakai, S. , Suzuki, Y., Itagaki, T., Tsujisawa, H., and Makino, T. T. (2008)  On the function of hermaphrodite florets in female inflorescences in Petasites japonicus (Asteraceae).  Botany 86:213-217.

63. Makino, T. T. and Sakai, S. (2007)  Experience changes pollinator responses to floral display size: from size-based to reward-based foraging.  Functional Ecology 21:854-863.

62. Sakai, S. and Harada Y. (2007)  Optimum size and number of seeds when seeds suffer predispersal predation.  Evolutionary Ecology Research 9:599-617.

61. Sakai, S. (2007)  A new hypothesis for the evolution of overproduction of ovules: an advantage of selective abortion for females not associated with variation in genetic quality of the resulting seeds.  Evolution 61:984-993.

60. Makino T. T., Ohashi, K. and Sakai, S. (2007)  How do floral display size and the density of surrounding flowers influence the likelihood of bumble-bee revisitation to a plant? Functional Ecology 21:87-95.

59. Fujitaka, T. and Sakai, S. (2007) Sexual dimorphism in clonal growth forms and ramet distribution patterns in Rumex acetosella (Polygonaceae).  Ecological Reaearch 22:248-254.

58. Hiraga, T. and Sakai, S. (2007) The effects of inflorescence size and flower position on biomass and temporal sex allocation in Lobelia sessiliflora. Plant Ecoogy 188:205-214.

57. Itagaki, T. and Sakai, S. (2006) Relationship between floral longevity and floral sex allocation among flowers within inflorescences in Aquilegia buergeriana var. oxysepala (Ranunculaceae).  American Journal of Botaby 93:1320-1327.

56. Tsuchimatsu, T., Sakai, S., and Ito, M. (2006) Sex allocation bias in hermaphroditic plants: effects of local competition and seed dormancy.  Evolutionary Ecology Reaearch 8:829-842.

55. Sakai, A., Sasa, A., and Sakai, S. (2006) Do sexual dimorphisms in reproductive allocation and shoot growth increase with an increase of altitude? a case of the shrub willow Salix reinii (Salicaceae).  American Journal of Botany 93:988-992.

54. Sakai, S., Sakai, A. and Fujioka, K. (2006) Seed production in Cardiocrium cordatum: effects of nitrogen and dry mass availability of a plant. Canadian Journal of Botany 84:805-812.

53. Morinaga, S.-I. and Sakai, S. (2006) Functional differentiation in pollination processes between the outer and the inner perianths in Iris gracilipes (Iridaceae). Canadian Journal of Botany 84:164-171.

52. Kabeya, D. and Sakai, S. (2005) The relative importance of carbohydrate and nitrogen for the resprouting ability of Quercus crispula seedlings. Annals of Botany 96:479-488.

51. Takahashi, K., Makino, T. T., and Sakai, S. (2005) Effects of sib-competition on female reproductive success in Salvia lutescens Koidz. var. crenata. Evolutionary Ecology Research 7:1021-1207.

50. Miyake, Y. C. and Sakai, S. (2005) Effects of number of flowers per raceme and number of racemes in a plant on bumblebee visits and female reproductive success in Salvia nipponica (Labiatae). Ecological Research 20:395-403.

49. Makino, T. T. and Sakai, S. (2005) Does interaction between bumblebees (Bombus ignitus) reduce their foraging area?: bee-removal experiments in a net cage. Behavioral Ecology and Sociobiolgy 57:617-622.

48. Sakai, S. and Harada, Y. (2005) Production of offspring using current income and reserves: size-number trade-off and optimal offspring size. Journal of theoretical Biolgy 233:65-73.

47. Sakai, S. and Sakai, A. (2005) Nature of size-number trade-off: test of the terminal-stream-limitation model for seed production of Cardiocrium Cordatum. Oikos 108:105-114.

46. Makino, T. T. Sakai, S. (2004) Findings on spatial foraging patterns of bumblebees (Bombus ignitus) from a bee-tracking experiment in a net cage.  Behavioral Ecology and Sociobiology 56:155-163.

45. Iwaizumi, M. Sakai, S. (2004) Variation in flower biomass among nearby populations in Impatiens textori (Balsaminaceae): effects of population plant densities. Canadian Journal of Botany 82:563-572.

44. Sakai, S. and Harada, Y. (2004) Size-number trade-off and optimal offspring size for offspring produced sequentially using a fixed amount of reserves. Journal of theoretical Biology 226: 253-264.

43. Kabeya, D. and Sakai, S. (2003) The role of roots and cotyledons as storage organs in early stages of establishment in Quercus crispula: a quantitative analysis of the nonstructural carbohydrate in cotyledons and roots. Annals of Botany 92:537-545.

42. Morinaga, S.-I., Tsuji, K., and Sakai, S. (2003) Consequences of differences in flowering date in seed production in Heloniopsis orientalis (Liliaceae). American Journal of Botany 90: 1153-1158.

41. Kabeya, D., Sakai, A., Matsui, K., Sakai, S. (2003) Resprouting ability of Quercus crispula seedlings depends on the vegetation cover of their microhabitats. Journal of Plant Research 116: 207-216.

40. Sakai, A., Matsui, K. , Kabeya, D. Sakai, S. (2003) Altitudinal variation in lifetime growth trajectory and reproductive schedule of a sub-alpine conifer Abies mariesii. Evolutionary Ecology Research 5: 671-689.

39. Sakai, A. Sakai, S. (2003) Size-dependent ESS sex allocation in wind-pollinated cosexual plants: fecundity vs. stature effects. Journal of theoretical Biology 222: 283-295.

38. Kimura, T., Ishii, H. S. Sakai, S. (2002) Selfed-seed production depending on individual size and flowering sequence in Iris gracilipes (Iridaceae). Canadian Journal of Botany 80: 1096-1102.

37. Ishii, H. S. Sakai, S. (2002) Temporal variation in floral display size and individual floral sex allocation in racemes of Narthecium asiaticum (Liliaceae). American Journal of Botany 89: 441-446.

36. Ishii, H. S. Sakai, S. (2001) Implications of geitonogamous pollination for floral longevity in Iris gracilipes (Iriddaceae). Functional Ecology 15: 633-641.

35. Ishii, H. S. Sakai, S. (2001) Effects of floral display size and floral positions on individual floral longevities in racemes of Narthecium asiaticum (Liliaceae). Functional Ecology 15: 396-405.

34. Sakai, S. and Harada, Y. (2001) Why do large mothers produce large offspring?: theory and a test. American Naturalist 157: 348-359.

33. Sakai, S. and Harada, Y. (2001) Sink-limitation and the size-number trade-off of organs: production of organs using a fixed amount of reserves. Evolution 55: 467-476.

32. Sakai, S. (2000) Biased sex allocation in hermaphroditic plants. Journal of Plant Research 113: 335-342.

31. Sakai, S. (2000) Size-number trade-off and allocation to flower production in animal-pollinated plants. Plant Species Biology 15: 261-268.

30. Ishii, H. S. & Sakai, S. (2000) Optimal timing of flower abortion; experimental study on Erythronium japoncum (Liliaceae). Functional Ecology 14: 122-128.

29. Sakai, S. (1999) Female-biased sexual allocation in cosexual plants: result of sink-limited growth of fruits. Evolutionary Ecology Research 1: 953-957.

28. Sakai, S., Ishii, H. S. (1999) Why be completely outcrossing? evolutionarily stable outcrossing strategies in an environment where outcross pollen availability is unpredictable. Evolutionary Ecology Research 1: 211-222.

27. Sakai, S. (1998) Female-biased sexual allocation in relation to growth rate of fruit in Erythronium japonicum. Oecologia 117: 391-395.

26. Sakai, A. Sakai, S. (1998) A test for the resource recovery hypothesis: tree sprouting using carbohydrates from above-ground parts. Annals of Botany 82: 213-216.

25. Sakai, S., & Harada, Y. (1998) Does the trade-off between growth and reproduction select for female-biased sexual allocation in cosexual plants? Evolution 52: 1204-1207.

24. Sakai, S., Kikuzawa, K., Umeki, K. (1998) Evolutionarily stable resource allocation for production of wind-dispersed seeds. Evolutionary Ecology 12: 477-485.

23. Sakai, S. (1997) An analytical model for flower production in an environment where resource availability is unpredictable. Journal of theoretical Biology 189: 449-452.

22. Sakai, S., Sakai, A., Ishii, H. S. (1997) Patterns of wing size variation in seeds of the lily Cardiocrinum cordatum (Liliaceae). American Journal of Botany 84: 1275-1278.

21. Sakai, A., Sakai, S., Akiyama, F. (1997) Do sprouting tree species on erosion-prone sites carry large reserves of resources? Annals of Botany 79: 625-630.

20. Sakai, S. (1996) On ovule production in environments where pollinator or resource availability is unpredictable. Journal of theoretical Biology 183: 317-327.

19. Sakai, S., Sakai, A. (1996) Why is there variation in mean seed size among plants within single populations? Test of the fertilization efficiency hypothesis. American Journal of Botany 83: 1454-1457.

18. Sakai, S. (1996) Using phylogenies to explain seed size variation among plants. Journal of evolutionary Biology 9: 243-252.

17. Sakai, S. (1996) Theoretical approaches on the growth strategy of plants in upredictable enviornments. Plant Morphology 8: 21-26.

16. Sakai, S., & Sakai, A. (1995) Flower size-dependent variation in seed size: theory and a test. American Naturalist 145: 918-934.

15. Sakai, S. (1995) Evolutionarily stable selfing rates of hermaphroditic plants in competing and delayed selfing modes with allocation to attractive structures. Evolution 49: 557-564.

14. Sakai, S. (1995). A model for seed size variation among plants. Evolutionary Ecology 9: 495-527.

13. Sakai, S. (1995) Evolutionarily stable growth of a sapling which waits for future gap formation under closed canopy. Evolutionary Ecology 9: 444-452.

12. Sakai, S. (1995) Optimal resource allocation to vegetative and sexual reproduction of a plant growing in a spatially varying environment. Journal of theoretical Biology 175: 271-282.

11. Sakai, S. (1994) Optimal leaf phenology and photosynthetic capacity of herbs dependent on the genet density of herbs in their habitat. Journal of theoretical Biology 166: 237-244.

10. Sakai, S. (1993) Allocation to attractive structures in animal-pollinated flowers. Evolution 47: 1711-1720.

9. Sakai, S. (1993) A model for nectar secretion in animal-pollinated plants. Evolutionary Ecology 7: 394-400.

8. Sakai, S., & Harada, Y. (1993) Habitat productivity and optimal growth schedule of annual plants in a seasonal environment. Journal of theoretical Biology 163: 347-363.

7. Sakai, S. (1993) The evolutionary viewpoint on the diversity in above-ground architecture of herbaceous plants. Forma 8: 245-253.

6. Sakai, S. (1992) Asynchronous leaf expansion and shedding in a seasonal environment: result of a competitive game. Journal of theoretical Biology 154: 77-90.

5. Sakai, S. (1991) A model analysis for the adaptive architecture of herbaceous plants. Journal of theoretical Biology 148: 535-544.

4. Sakai, S. (1990) Sympodial and monopodial branching in Acer: implications for tree architecture and adaptive significance. Canadian Journal of Botany 68: 1549-1553.

3. Sakai, S. (1990) The relationship between bud scale morphology and indeterminate and determinate growth patterns in Acer (Aceraceae). Canadian Journal of Botany 68: 144-148.

2. Sakai, S. (1990) Sympodial and monopodial branching in Acer: evolutionary trend and ecological implications. Plant Systematics and Evolution 171: 187-1974.

1. Sakai, S. (1987) Patterns of branching and extension growth of vigorous saplings of Japanese Acer species in relation to their regeneration strategies. Canadian Journal of Botany 65: 1578-1585.

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