Arbuscular mycorrhizas modify tomato responses to soil zinc and phosphorus addition

作者：Watts Williams Stephanie J; Cavagnaro Timothy R^*

来源：Biology and Fertility of Soils, 2012, 48(3): 285-294.

DOI：10.1007/s00374-011-0621-x

• Arbuscular mycorrhizas (AM)
• Zinc
• Phosphorus
• Mycorrhiza defective tomato mutant (rmc)
• Solanum lycopersicum (Tomato)

Arbuscular mycorrhizas (AM) play an important role in plant P and Zn nutrition; however, relatively few studies have directly investigated the interactive effects of these nutrients on plants. Therefore, we undertook a glasshouse experiment to study the effects of Zn and P on AM formation and functioning. A mycorrhiza defective tomato mutant (rmc) and its mycorrhizal wild-type progenitor (76R) were used in this experiment. Plants were grown in soil amended with five Zn concentrations, ranging from deficient to toxic, and two levels of P addition. The addition of Zn and P to the soil over a range of concentrations had profound effects on plant growth and nutrition and mycorrhizal colonization. Mycorrhizal benefits were the greatest when plants were grown under low soil P and Zn. Furthermore, the effect of soil Zn supply on plant growth, nutrition, and AM colonization was strongly influenced by the concentration of P in the soil. Thus, studies of AM and Zn (or other nutrients of interest) should take into account the impact of soil P concentration on the role of AM in plant Zn acquisition, under both deficient and toxic soil Zn concentrations.

• 出版日期2012-4