Abstract
Reproduction is an essential function of all organisms and, for many crop species, reproductive structures are the principle edible parts. Still, relatively little is known about the effects of the mycorrhizal symbiosis on host plant reproduction. Common limitations to reproduction include nutrient deficiency, herbivory and disease, and mycorrhizal fungi can influence each of these. Several aspects of sexual reproduction may be influenced by colonization of mycorrhizal fungi including the timing of reproductive events, the number of inflorescences per plant, the number of flowers per inflorescence, the amount of pollen per flower, the proportion of flowers producing fruits, and the number of seeds per fruit. Seed quality can also be strongly influenced by colonization of mycorrhizal fungi, resulting in variation in seedling vigor and resultant competitive ability. Because infection by mycorrhizal fungi can influence interactions among plants, it may lead to variation among individuals in their contributions to the next generation and, therefore, may control the genetic structures of populations and communities.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Abbott LK, Robson AD (1982) The role of vesicular arbuscular mycorrhizal fungi in agriculture and the selection of fungi for inoculation. Aust J Agric Res 32:389–408
Abbott LK, Robson AD (1984) The effect of VA mycorrhizae on plant growth. In: Powell CL, Bagyaraj DJ (eds) VA mycorrhiza. CRC Press, Boca Raton, FL
Allen EB, Allen MF (1984) Competition between plants of different successional stages: mycorrhizae as regulators. Can J Bot 62:2625–2629
Allsopp N, Stock WD (1992) Density dependent interactions between VA mycorrhizal fungi and even-aged seedlings of two perennial Fabaceae species. Oecologia 91:281–287
Austin RB (1966) The influence of the phosphorus and nitrogen nutrition of pea plants on the growth of their progeny. Plant Soil 24:53–58
Azcon Aguilar C, Barea JM (1996) Arbuscular mycorrhizas and biological control of soil-borne plant pathogens – An overview of the mechanisms involved. Mycorrhiza 6:457–464
Bååth E, Hayman DS (1984) Effect of soil volume and plant density on mycorrhizal infection and growth response. Plant Soil 77:373–376
Barry DAJ, Miller MH (1989) Phosphorus nutritional requirement of maize seedlings for maximum yield. Agronom J 81:95–99
Bazzaz FA, Chiariello NR, Coley PD, Pitelka LF (1987) Allocating resources to reproduction and defense. BioScience 37:58–67
Bethlenfalvay GJ, Schreiner RP, Mihara KL (1997) Mycorrhizal fungi effects on nutrient composition and yield of soybean seeds. J Plant Nutr 20:581–591
Bolan NS (1991) A critical review on the role of mycorrhizal fungi in the uptake of phosphorus by plants. Plant Soil 134:189–207
Bolland MDA, Paynter BH (1990) Increasing phosphorus concentration in seed of annual pasture legume species increases herbage and seed yields. Plant Soil 125:197–205
Bonfante P, Perotto S (1995) Strategies of arbuscular mycorrhizal fungi when infecting host plants. New Phytol 130:3–21
Borowicz VA (1997) A fungal root symbiont modifies plant resistance to an insect herbivore. Oecologia 112:534–542
Boswell EP, Koide RT, Shumway DL, Addy HD (1998) Winter wheat cover cropping, VA mycorrhizal fungi and maize growth and yield. Agric Ecosyst Environ 67:55–65
Bryla DR, Koide RT (1990) Regulation of reproduction in wild and cultivated Lycopersicon esculentum Mill. by vesicular-arbuscular mycorrhizal infection. Oecologia 84:74–81
Busse MD, Ellis JR (1985) Vesicular-arbuscular mycorrhizal (Glomus fasciculatum) influence on soybean drought tolerance in high phosphorus soil. Can J Bot 63:2290–2294
Buwalda JG (1980) Growth of a clover-ryegrass association with vesicular-arbuscular mycorrhizas. NZ J Agric Res 23:379–383
Carey PD, Fitter AH, Watkinson AR (1982) A field study using the fungicide benomyl to investigate the effect of mycorrhizal fungi on plant fitness. Oecologia 90:550–555
Caron M, Fortin JA, Richard C (1986) Effect of phosphorus concentration and Glomus intraradices on Fusarium crown and root rot of tomatoes. Phytopath 76:942–946
Clarke C, Mosse B (1981) Plant growth responses to vesicular-arbuscular mycorrhiza XII. Field inoculation responses of barley at two soil P levels. New Phytol 87:695–703
Cooper KM (1984) Physiology of VA mycorrhizal associations. In: Powell CL, Bagyaraj DJ (eds) VA mycorrhiza. CRC Press, Boca Raton, FL
Crush JR (1974) Plant growth responses to vesicular-arbuscular mycorrhiza VII. Growth and nodulation of some herbage legumes. New Phytol 73:743–749
Cuenca G, Lovera M (1992) Vesicular arbuscular mycorrhizae in disturbed and revegetated sites from La Gran Sabana, Venezuela. Can J Bot 70:73–79
Daft MJ, Okusanya BO (1973) Effect of Endogone mycorrhiza on plant growth. VI. Influence of infection on the anatomy and reproductive development in four hosts. New Phytol 72:1333–1339
Davis RM, Menge JA (1981) Phytophthora parasitica inoculation and intensity of vesicular-arbuscular mycorrhizae in citrus. New Phytol 87:705–715
Del Vecchio TA, Gehring CA, Cobb NS, Whitham TG (1993) Negative effects of scale insect herbivory on the ectomycorrhizae of juvenile pinyon pine. Ecology 74:22997–2302
Dodd J, Jeffries P (1986) Early development of vesicular-arbuscular mycorrhizas in autumn-sown cereals. Soil Biol Biochem 18:149–154
Dodd J, Krikun J, Haas J (1983) Relative effectiveness of indigenous populations of vesicular-arbuscular mycorrhizal fungi from four sites in the Negev. Israel J Bot 32:10–21
Douds DD, Nagahashi G, Reider C, Hepperly PR (2007) Inoculation with arbuscular mycorrhizal fungi increases the yield of potatoes in a high P soil. Biol Agric Hort 25:67–78
Dunne MJ, Fitter AH (1989) The phosphorus budget of a field-grown strawberry (Fragaria x ananassa cv. Hapil) crop: evidence for a mycorrhizal contribution. Ann Appl Biol 114:185–193
Facelli E, Facelli JM (2002) Soil phosphorus heterogeneity and mycorrhizal symbiosis regulate plant intra-specific competition and size distribution. Oecologia 133:54–61
Fitter AH (1977) Influence of mycorrhizal infection on competition for phosphorus and potassium by two grasses. New Phytol 79:119–125
Fitter AH (1991) Costs and benefits of mycorrhizas: Implications for functioning under natural conditions. Experientia 47:350–355
Francis R and Read DJ (1994) The contributions of mycorrhizal fungi to the determination of plant community structure. In: Robson AD, Abbott LK, Malajczuk (eds) Management of mycorrhizas in agriculture, horticulture and forestry. Kluwer, Dordrecht, Netherlands
Gange AC (1998) A potential microbiological method for the reduction of Poa annua L. in golf greens. J Turfgrass Sci 74:9–14
Gange AC, Smith AK (2005) Arbuscular mycorrhizal fungi influence visitation rates of pollinating insects. Ecol Entomol 30:600–606
Gange AC, West HM (1994) Interactions between arbuscular mycorrhizal fungi and foliar-feeding insects in Plantago lanceolata L. New Phytol 128:79–87
Gange AC, Brown VK, Sinclair GS (1993) Vesicular-arbuscular mycorrhizal fungi: a determinant of plant community structure in early succession. Funct Ecol 7:616–622
Gehring C, Bennett A (2009) Mycorrhizal fungal-plant-insect interactions: the importance of a community approach. Environ Entomol 38:93–102
Gehring CA, Whitham TG (1991) Herbivore-driven mycorrhizal mutualism in insect-susceptible pinyon pine. Nature 353:556–557
Gehring CA, Whitham TG (1994) Interactions between above-ground herbivores and the mycorrhizal mutualists of plants. TREE 9:251–255
Gerdemann JW (1968) Vesicular-arbuscular mycorrhiza and plant growth. Ann Rev Phytopath 6:397–418
Gianinazzi-Pearson V, Gianinazzi S (1983) The physiology of vesicular-arbuscular mycorrhizal roots. Plant Soil 71:197–209
Grime JP, Mackey JML, Hillier SH, Read DJ (1987) Floristic diversity in a model system using experimental microcosms. Nature 328:420–422
Guo T, Zhang J, Christie P, Li X (2006) Influence of nitrogen and sulfur fertilizers and inoculation with arbuscular mycorrhizal fungi on yield and pungency of spring onion. J Plant Nutr 29:1767–1778
Hall IR (1978) Effects of endomycorrhizas on the competitive ability of white clover. NZ J Agric Res 21:509–515
Hall JR, Hodges TK (1966) Phosphorus metabolism of germinating oat seeds. Plant Physiol 41:1459–1464
Harrison MJ (1999) Molecular and cellular aspects of the arbuscular mycorrhizal symbiosis. Ann Rev Plant Physiol Plant Molec Biol 50:361–389
Hartnett DC, Hetrick BAD, Wilson GWT, Gibson DJ (1993) Mycorrhizal influence on intra- and interspecific neighbour interactions among co-occurring prairie grasses. J Ecol 81:787–795
Hartnett DC, Samenus RJ, Fischer LE, Hetrick BAD (1994) Plant demographic responses to mycorrhizal symbiosis in tallgrass prairie. Oecologia 99:21–26
Hayman DS (1983) The physiology of vesicular-arbuscular endomycorrhizal symbiosis. Can J Bot 61:944–963
Hendrix SD (1988) Herbivory and its impact on plant reproduction. In: Lovett Doust J, Lovett Doust L (eds) Plant reproductive ecology, patterns and strategies. Oxford University Press, New York
Heppell KB, Shumway DL, Koide RT (1998) The effect of mycorrhizal infection of Abutilon theophrasti on competitiveness of offspring. Funct Ecol 12:171–175
Hetrick BAD, Wilson GWT, Hartnett DC (1989) Relationship between mycorrhizal dependence and competitive ability of two tallgrass prairie grasses. Can J Bot 67:2608–2615
Janos DP (1980) Mycorrhizae influence tropical succession. Biotropica 12(Suppl):56–64
Jensen A (1982) Influence of four vesicular-arbuscular mycorrhizal fungi on nutrient uptake and growth in barley (Hordeum vulgare). New Phytol 90:45–50
Jones CG, Last FT (1991) Ectomycorrhizae and trees: implications for aboveground herbivory. In: Barbosa P, Krischik VA, Jones CG (eds) Microbial mediation of plant-herbivore interactions. Wiley, New York
Karagiannidis N, Hadjisavva-Zinoviadi S (1998) The mycorrhizal fungus Glomus mosseae enhances growth, yield and chemical composition of a durum wheat variety in 10 different soils. Nutr Cycl Agroecosyst 52:1–7
Kaufman JL, Guitard AA (1967) The effect of seed size on early plant development in barley. Can J Plant Sci 47:73–78
Khanizadeh S, Hamel C, Kianmehr H et al (1995) Effect of three vesicular-arbuscular mycorrhizae species and phosphorus on reproductive and vegetative growth of three strawberry cultivars. J Plant Nutr 18:1073–1079
Koide RT (1991a) Density-dependent response to mycorrhizal infection in Abutilon theophrasti Medic. Oecologia 85:389–395
Koide RT (1991b) Nutrient supply, nutrient demand and plant response to mycorrhizal infection. New Phytol 117:365–386
Koide RT (1998) Ecological considerations of mycorrhizal symbioses. In: Lynch J, Deikman J (eds) Phosphorus in plant biology: regulatory roles in cellular, organismic, and ecosystem processes. American Society of Plant Physiologists, Rockville, MD
Koide RT (2000) Functional complementarity in the arbuscular mycorrhizal symbiosis. New Phytol 147:233–235
Koide RT, Li M (1991) Mycorrhizal fungi and the nutrient ecology of three oldfield annual plant species. Oecologia 85:403–412
Koide RT, Lu X (1992) Mycorrhizal infection of wild oats: maternal effects on offspring growth and reproduction. Oecologia 90:218–226
Koide RT, Lu X (1995) On the cause of offspring superiority conferred by mycorrhizal infection of Abutilon theophrasti. New Phytol 131:435–441
Koide RT, Huenneke LF, Hamburg SP, Mooney HA (1988a) Effects of applications of fungicide, phosphorus and nitrogen on the structure and productivity of an annual serpentine plant community. Funct Ecol 2:335–344
Koide RT, Li M, Lewis J, Irby C (1988b) Role of mycorrhizal infection in the growth and reproduction of wild vs. cultivated plants. I. Wild vs. cultivated oats. Oecologia 77:537–543
Koide RT, Shumway DL, Mabon SA (1994) Mycorrhizal fungi and reproduction of field populations of Abutilon theophrasti Medic. (Malvaceae). New Phytol 126:123–130
Lau T-C, Koide RT, Stephenson AG (1995) Effects of soil fertility and mycorrhizal infection on pollen production nand pollen grain size of Cucurbita pepo (Cucurbitaceae). Plant Cell Environ 18:169–177
Leake JR (1994) The biology of myco-heterotrophic (‘saprophytic’) plants. New Phytol 127:171–216
Lee TD (1988) Patterns of fruit and seed production. In: Lovett Doust J, Lovett Doust L (eds) Plant reproductive ecology, patterns and strategies. Oxford University Press, New York
Lewis JD, Koide RT (1990) Phosphorus supply, mycorrhizal infection and plant offspring vigour. Funct Ecol 4:695–702
Lu X, Koide RT (1991) Avena fatua L. seed and seedling nutrient dynamics as influenced by mycorrhizal infection of the maternal generation. Plant Cell Environ 14:931–939
Lu X, Koide RT (1994) The effects of mycorrhizal infection on components of plant growth and reproduction. New Phytol 128:211–218
Maffia B, Janos DP (1993) Vesicular-arbuscular mycorrhizae influence seedling survival and size disparity in sunflower (Helianthus annuus L.) in dense, monospecific stands. In: Peterson L, Schelke M (eds) Abstracts of the ninth North American conference on Mycorrhizae. University of Guelph, Ontario, Canada
Mayer AM (2004) Resistance to herbivores and fungal pathogens: Variations on a common theme? A review comparing the effect of secondary metabolites, induced and constitutive, on herbivores and fungal pathogens. Israel J Plant Sci 52:279–292
McGonigle TP, Fitter AH (1988) Ecological consequences of arthropod grazing on VA mycorrhizal fungi. Proc Roy Soc Edinb 94B:25–32
Merryweather M, Fitter A (1996) Phosphorus nutrition of an obligately mycorrhizal plant treated with the fungicide benomyl in the field. New Phytol 132:307–311
Miller RM (1987) Mycorrhizae and succession. In: Jordan WR III, Gilpin ME, Aber JD (eds) Restoration ecology, a synthetic approach to ecological research. Cambridge University Press, Cambridge
Miller RM, Jarstfer AG, Pillai JK (1987) Biomass allocation in an Agropyron smithii – Glomus symbiosis. Am J Bot 74:114–122
Moora M, Zobel M (1996) Effect of arbuscular mycorrhiza on inter- and intraspecific competition of two grassland species. Oecologia 108:79–84
Mullen RB, Schmidt SK (1993) Mycorrhizal infection, phosphorus uptake, and phenology in Ranunculus adoneus: implications for the functioning of mycorrhizae in alpine systems. Oecologia 94:229–234
Muthukumar T, Udaiyan K (2002) Growth and yield of cowpea as influenced by changes in arbuscular mycorrhiza in response to organic manuring. J Agronom Crop Sci 188:123–132
Nakatsubo T (1997) Effects of arbuscular mycorrhizal infection on the growth and reproduction of the annual legume Kummerowia striata growing in a nutrient-poor alluvial soil. Ecol Res 12:231–237
Newsham KK, Fitter AH, Watkinson AR (1994) Root pathogenic and arbuscular mycorrhizal fungi determine fecundity of asymptomatic plants in the field. J Ecol 82:805–814
Newsham KK, Fitter AH, Watkinson AR (1995) Multi-functionality and biodiversity in arbuscular mycorrhizas. TREE 10:407–411
Nuortila C, Kytöviita M-M, Tuomi J (2004) Mycorrhizal symbiosis has contrasting effects on fitness components in Campanula rotundifolia. New Phytol 164:543–553
Parrish JAD, Bazzaz FA (1985) Nutrient content of Abutilon theophrasti seeds and the competitive ability of the resulting plants. Oecologia 65:247–251
Patton DC, Ford HA (1983) The influence of plant characters and honeyeater size on levels of pollination in Australian plants. In: Jones CE, Little RJ (eds) Handbook of experimental pollination biology. Van Nostrand Reinhold, New York
Pendleton RL (2000) Pre-inoculation by an arbuscular mycorrhizal fungus enhances male reproductive output of Cucurbita foetidissima. Int J Plant Sci 161:683–689
Philip LJ, Posluszny U, Klironomos JN (2001) The influence of mycorrhizal colonization on the vegetative growth and sexual reproductive potential of Lythrum salicaria L. Can J Bot 79:381–388
Pickett JA, Smiley DWM, Woodcock CM (1999) Secondary metabolites in plant-insect interactions: Dynamic systems of induced and adaptive responses. Adv Bot Res 30:91–115
Powell CL (1981) Inoculation of barley with efficient mycorrhizal fungi stimulates seed yield. Plant Soil 59:487–489
Powell CL, Bates PM (1981) Ericoid mycorrhizas stimulate fruit yield of blueberry. HortScience 16:655–656
Rabin LB, Pacovsky RS (1985) Reduced larva growth of two Lepidoptera (Noctuidae) on excised leaves of soybean infected with a mycorrhizal fungus. J Econ Entomol 78:1358–1363
Read DJ (1991) Mycorrhiza in ecosystems. Experientia 47:376–391
Read DJ, Perez-Moreno (2003) Mycorrhizas and nutrient cycling in ecosystems - a journey towards relevance? New Phytol 157:475–492
Ries SL, Eversen EH (1973) Protein content and seed size relationship with seedling vigor of wheat cultivars. Agron J 65:884–886
Sanders IR, Koide RT (1993) Nutrient acquisition and community structure in co-occurring mycotrophic and non-mycotrophic old-field annuals. Funct Ecol 7:77–84
Sanders I, Koide RT, Shumway DL (1993) Mycorrhizal stimulation of plant parasitism. Can J Bot 71:1143–1146
Sanders I, Koide RT, Shumway D (1999) Diversity and structure in natural communities: the role of the mycorrhizal symbiosis. In: Varma A, Hock B (eds) Mycorrhizae: structure, function, molecular biology and biotechnology, 2nd edn. Springer, Berlin
Sattin M, Zanin G, Berti A (1992) Case history for weed competition/population ecology: velvetleaf (Abutilon theophrasti) in corn (Zea mays). Weed Technol 6:213–219
Schaffer WH, Schaffer MV (1979) The adaptive significance of variations in reproductive habit in the Agavaceae. II. Pollinator foraging behavior and selection for increased reproductive expenditure. Ecology 60:1051–1069
Schemske DW (1980a) Evolution of floral display in the orchid Brassavola nodosa. Evolution 34:489–493
Schemske DW (1980b) Floral ecology and hummingbird pollination of Combretum farinosum in Costa Rica. Biotropica 12:169–181
Schemske DW, Wilson MF, Melampy MN et al (1978) Flowering ecology of some woodland herbs. Ecology 59:351–366
Schenck NC, Smith GS (1982) Responses of six species of vesicular-arbuscular mycorrhizal fungi and their effect on soybean at four soil temperatures. New Phytol 92:193–201
Schweizer CJ, Ries SK (1969) Protein content of seed: increase improves growth and yield. Science 165:73–75
Shumway DL, Koide RT (1994) Within-season variability in mycorrhizal benefit to reproduction in Abutilon theophrasti Medic. Plant Cell Environ 17:821–827
Shumway DL, Koide RT (1995) Size and reproductive inequality in mycorrhizal and nonmycorrhizal populations of Abutilon theophrasti. J Ecol 83:613–620
Smith SE, Gianinazzi-Pearson V (1988) Physiological interactions between symbionts in vesicular-arbuscular mycorrhizal plants. Ann Rev Plant Physiol Plant Mol Biol 39:221–244
Smith SE, Read DJ (1997) Mycorrhizal symbiosis, 2nd edn. Academic, San Diego, CA
Smith FA, Grace EJ, Smith SE (2009) More than a carbon economy: nutrient trade and ecological sustainability in facultative arbuscular mycorrhizal symbioses. New Phytol 182:347–358
Stanley MR, Koide RT, Shumway DL (1993) Mycorrhizal symbiosis increases growth, reproduction and recruitment of Abutilon theophrasti Medic. in the field. Oecologia 94:30–35
Stephenson AG, Poulton JL, Lau TC, Koide RT (1999) Effects of soil phosphorus level and mycorrhizal infection on the male function of plants. In: Lynch J, Deikman J (eds) Phosphorus in plant biology: regulatory roles in molecular, cellular, organismic, and ecosystem processes. American Society of Plant Physiologists, Rockville, MD
Stevenson MJ, Perera IY, Heilman I, Person S, Boss WF (2000) Inositol signaling and plant growth. Trends Plant Sci 5:252–258
Streitwolf-Engel R, van der Heijden MGA, Wiemken A, Sanders IR (2001) The ecological significance of arbuscular mycorrhizal fungal effects on clonal reproduction in plants. Ecology 82:2846–2859
Sudová R, Vosátka M (2008) Effects of inoculation with native arbuscular mycorrhizal fungi on clonal growth of Potentilla reptans and Fragaria moschata (Rosaceae). Plant Soil 308:55–67
Sylvia DM (1983) Role of Laccaria laccata in protecting primary roots of Douglas-fir from root rot. Plant Soil 71:299–302
Taber RA (1982) Occurrence of Glomus spores in weed seeds in soil. Mycologia 74:515–520
Thompson JP, Wildermuth GB (1989) Colonization of crop and pasture species with vesicular-arbuscular mycorrhizal fungi and a negative correlation with root infection by Bipolaris sorokiniana. Can J Bot 69:687–693
Vejsadova H, Siblikova D, Gryndler M et al (1993) Influence of inoculation with Bradyrhizobium japonicum and Glomus claroideum on seed yield of soybean under greenhouse and field conditions. J Plant Nutr 16:619–629
Venkateswarlu B, Pirat M, Kishore N, Rasul A (2008) Mycorrhizal inoculation in neem (Azadirachta indica) enhances azadirachtin content in seed kernals. World J Microbiol Biotechnol 24:1243–1247
Wallace LL (1981) Growth, morphology and gas exchange of mycorrhizal and nonmycorrhizal Panicum coloratum L., a C4 grass species, under different clipping and fertilization regimes. Oecologia 49:272–278
Weiner J (1988) The influence of competition on plant reproduction. In: Lovett Doust J, Lovett Doust L (eds) Plant reproductive ecology, patterns and strategies. Oxford University Press, New York
Weiner J (1990) Asymmetric competition in plant populations. Trends Ecol Evol 5:360–364
West HM, Fitter AH, Watkinson AR (1993a) The influence of three biocides on the fungal associates of the roots of Vulpia ciliata ssp. ambigua under natural conditions. J Ecol 81:345–350
West HM, Fitter AH, Watkinson AR (1993b) Response of Vulpia ciliata ssp. ambigua to removal of mycorrhizal infection and to phosphate application under natural conditions. J Ecol 81:351–358
Wilson JB (1988) The effect of initial advantage on the course of plant competition. Oikos 51:19–24
Wyatt R (1981) The reproductive biology of Asclepias tuberose. II. Factors determining fruit set. New Phytol 88:375–385
Zhang M, Nyborg M, McGill WB (1990) Phosphorus concentration in barley (Hordeum vulgare L.) seed: influence on seedling growth and dry matter production. Plant Soil 122:79–83
Acknowledgments
The U.S. National Science Foundation, the U.S. Department of Agriculture and the A.W. Mellon Foundation provided funding for research leading to many of the results discussed herein.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2010 Springer Science+Business Media B.V.
About this chapter
Cite this chapter
Koide, R.T. (2010). Mycorrhizal Symbiosis and Plant Reproduction. In: Koltai, H., Kapulnik, Y. (eds) Arbuscular Mycorrhizas: Physiology and Function. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-9489-6_14
Download citation
DOI: https://doi.org/10.1007/978-90-481-9489-6_14
Published:
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-9488-9
Online ISBN: 978-90-481-9489-6
eBook Packages: Biomedical and Life SciencesBiomedical and Life Sciences (R0)