Dept. Biología Vegetal (Botánica), Universidad de Murcia, Campus de Espinardo, Murcia, Spain.
Mycorrhiza. 2011 May;21(4):247-53. doi: 10.1007/s00572-010-0329-z. Epub 2010 Jul 20.
The ability of two species of desert truffle, Terfezia claveryi strain TcS2 and Picoa lefebvrei strain OL2, to tolerate water stress in pure culture has been investigated. Both T. claveryi and P. lefebvrei strains exhibited a mycelium growth pattern characteristic of drought tolerant species. However, they were only tolerant to moderate water stress, below -1.07 MPa, with the P. lefebvrei isolate being slightly more drought tolerant than the T. claveryi isolate. The increased alkaline phosphatase (ALP) activity observed in both fungi at moderate water stress with respect to the control indicated the functional adaptation of these mycelia to these drought conditions. ALP activity can be used as an indicator of the metabolic activity of these fungi. Slight water stress (-0.45 MPa) could improve mycelial inoculum production of these desert truffles. Moreover, P. lefebvrei could be a good candidate for further desert truffle mycorrhizal plant cultivation programmes in semiarid Mediterranean areas.
已经研究了两种沙漠块菌，即 Terfezia claveryi 菌株 TcS2 和 Picoa lefebvrei 菌株 OL2，在纯培养中耐受水分胁迫的能力。T. claveryi 和 P. lefebvrei 菌株都表现出具有耐旱物种特征的菌丝体生长模式。然而，它们仅能耐受适度的水分胁迫，低于-1.07 MPa，P. lefebvrei 分离株比 T. claveryi 分离株略耐旱。与对照相比，在适度水分胁迫下观察到两种真菌中碱性磷酸酶（ALP）活性的增加表明这些菌丝体对这些干旱条件的功能适应。ALP 活性可作为这些真菌代谢活性的指标。轻微的水分胁迫（-0.45 MPa）可以提高这些沙漠块菌的菌丝体接种物产量。此外，P. lefebvrei 可能是在半干旱地中海地区进一步开展沙漠块菌菌根植物栽培计划的良好候选者。
