Iannucci Anna, Fragasso Mariagiovanna, Beleggia Romina, Nigro Franca, Papa Roberto
Centro di Ricerca per la Cerealicoltura e le Colture Industriali, Consiglio per la Ricerca in Agricoltura e l'analisi dell'Economia Agraria (CREA-CI), Foggia, Italy.
Dipartimento di Scienze Agrarie, Alimentari e Ambientali, Università Politecnica delle Marche, Ancona, Italy.
Front Plant Sci. 2017 Dec 13;8:2124. doi: 10.3389/fpls.2017.02124. eCollection 2017.
Domestication has induced major genetic changes in crop plants to satisfy human needs and as a consequence of adaptation to agroecosystems. This adaptation might have affected root exudate composition, which can influence the interactions in the rhizosphere. Here, using two different soil types (sand, soil), we provide an original example of the impact of domestication and crop evolution on root exudate composition through metabolite profiling of root exudates for a panel of 10 wheat genotypes that correspond to the key steps in domestication of tetraploid wheat (wild emmer, emmer, durum wheat). Our data show that soil type can dramatically affect the composition of root exudates in the rhizosphere. Moreover, the composition of the rhizosphere metabolites is associated with differences among the genotypes of the wheat domestication groups, as seen by the high heritability of some of the metabolites. Overall, we show that domestication and breeding have had major effects on root exudates in the rhizosphere, which suggests the adaptive nature of these changes.
驯化导致了作物的重大基因变化，以满足人类需求，并作为适应农业生态系统的结果。这种适应可能影响了根系分泌物的组成，而根系分泌物会影响根际中的相互作用。在这里，我们使用两种不同的土壤类型（沙子、土壤），通过对一组10个小麦基因型的根系分泌物进行代谢物谱分析，提供了一个关于驯化和作物进化对根系分泌物组成影响的原始例子，这10个小麦基因型对应于四倍体小麦驯化的关键步骤（野生二粒小麦、二粒小麦、硬粒小麦）。我们的数据表明，土壤类型可显著影响根际中根系分泌物的组成。此外，根际代谢物的组成与小麦驯化群体基因型之间的差异相关，这从一些代谢物的高遗传力可以看出。总体而言，我们表明驯化和育种对根际中的根系分泌物有重大影响，这表明这些变化具有适应性。
