caa a22 4500 469095709 CHVBK 20180323133030.0 cr unu---uuuuu 170328e19921001xx s 000 0 eng 10.1007/BF00317274 doi (NATIONALLICENCE)springer-10.1007/BF00317274 Mineral allocation to reproduction in Sorhum bicolor and Sorghum halepense in relation to parental nutrient supply [Elektronische Daten] [R. Benech Arnold, M. Fenner, P. Edwards] Summary: This experiment investigated the effect of parental nutrient shortage on the allocation of five nutrients to seeds and rhizomes in Sorghum halepense, a perennial, noxious weed, and to seeds in Sorghum bicolor, an annual, cultivated species. Plants from both species were grown from seeds and supplied with fertilizer at three concentrations. The allocation of biomass and nutrients (N, P, K, Ca and Mg) to reproductive and vegetative parts was determined. Relative biomass allocation to reproduction (either sexual or vegetative) remained constant in S. halepense in spite of large differences in total plant weight. In S. bicolor, however, biomass allocation to sexual reproductive structures decreased significantly with decreasing nutrient supply. Individual seed weight was not modified by parental nutrient supply in S. halepense, but it increased with decreasing nutrient availability in S. bicolor. Important differences in mineral allocation to seeds were found between the two species. While S. bicolor seeds were largely buffered from the differences in parental nutrient status, concentration of nutrients in S. halepense seeds decreased significantly with decreasing supply for all the nutrients analyzed except Ca. However, mineral nutrient concentration in S. halepense rhizomes remained remarkably constant despite differences in the external supply, evincing the priority given to vegetative reproduction at the expense of sexual reproduction. Overall, the pattern of nutrient allocation in S. bicolor seeds under different nutrient supply resembled the pattern observed in S. halepense rhizomes, but it had little resemblance to the pattern of nutrient allocation in S. halepense seeds. The results are discussed in terms of differences and similarities in the reproductive strategy of these two species. Springer-Verlag, 1992 Sorghum halepense nationallicence Sorghum bicolor nationallicence Mineral allocation nationallicence Reproduction nationallicence Benech Arnold R. Department of Biology, University of Southampton, SO9 5NH, Southampton, UK aut Fenner M. Department of Biology, University of Southampton, SO9 5NH, Southampton, UK aut Edwards P. Department of Biology, University of Southampton, SO9 5NH, Southampton, UK aut Oecologia Springer-Verlag 92/1(1992-10-01), 138-144 0029-8549 92:1<138 1992 92 442 https://doi.org/10.1007/BF00317274 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317274 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Benech Arnold R. Department of Biology, University of Southampton, SO9 5NH, Southampton, UK aut NATIONALLICENCE 700 1- Fenner M. Department of Biology, University of Southampton, SO9 5NH, Southampton, UK aut NATIONALLICENCE 700 1- Edwards P. Department of Biology, University of Southampton, SO9 5NH, Southampton, UK aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 92/1(1992-10-01), 138-144 0029-8549 92:1<138 1992 92 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer