 Hill et al., 2011) . The D-amino acids taken up by plants may be derived mainly from bacteria in the rhizosphere (Brodowski et al., 2005). In addition to higher organisms such as animals and plants, microbes (including planktonic algae, archaea, and bacteria) generally synthesize D-amino acids during development.
<coherence>  Hill et al., 2011) . The D-amino acids taken up by plants may be derived mainly from bacteria in the rhizosphere (Brodowski et al., 2005). In addition to higher organisms such as animals and plants, microbes (including planktonic algae, archaea, and bacteria) generally synthesize D-amino acids during development.
 Hill et al., 2011) ”