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  • A cross section of a Melilotus siculus root

    Waterlogging tolerance in the forage legume Melilotus siculus

    Messina (Melilotus siculus, Fabaceae) is a waterlogging-tolerant annual forage legume, but data were lacking for the effects of waterlogging on nodulated plants reliant on N2 fixation. Konnerup et al. find that plants inoculated with the appropriate rhizobia, Ensifer (syn. Sinorhizobium) medicae, formed nodules. Nodulated plants grew similarly well as plants fed NO3–, both in drained […] More

  • Root cortical aerenchyma inhibits radial nutrient transport

    Root cortical aerenchyma inhibits radial nutrient transport

    Root cortical aerenchyma (RCA) provides an adaptation to low nutrient availability by reducing the metabolic cost of soil exploration. Hu et al. use radiolabelling to investigate uptake of phosphate, sulphate and calcium in roots of maize (Zeay mays) differing in their degree of RCA formation. They find that in each of the three genotypes studied the […] More

  • Image: Hu et al., 2014. Annals of Botany 113: 181–189. []

    Your botanical ‘one-stop shop’

    There are plant biology journals that seem to concentrate on a single taxon (you know the ones I mean!) – e.g. The Plant Journal and The Plant Cell. There are others devoted to the molecular biology of plants, such as the aptly named Plant Molecular Biology, and to plant physiology, e.g. Plant Physiology. And all do good […] More

  • Flooding tolerance in interspecific introgression lines in Zea

    Flooding tolerance in interspecific introgression lines in Zea

    Nicaraguan teosinte Zea nicaraguensis, a species found in frequently flooded areas, is useful germplasm for breeding flooding-tolerant maize. Mano and Omori select flooding-tolerant lines using a library of introgression lines (ILs), each containing a chromosome segment from Z. nicaraguensis in the maize (Z. mays) inbred Mi29. The most flooding-tolerant line they identify contains a Z. […] More

  • Soybean roots

    Oxygen transport via aerenchyma in soybean

    When in flooded soil, soybean, Glycine max, produces aerenchyma and hypertrophic stem lenticels. Shimamura et al. (pp. 277–284) investigate the oxygen dynamics in these tissues and find that hypertrophic lenticels on the stem of soybean, just above the water surface, are entry points for O2, and these connect to aerenchyma and enable O2 transport into […] More