In this study, we investigated the pattern of short-term temporal variation in the arbuscular mycorrhizal (AM) fungi and physico-chemical edaphic properties of some wheat growing areas of the Bundelkhand region, Central India. Rhizospheric soil samples were collected every month from December 2007 to May 2008 from four wheat growing sites around Jhansi (Bundelkhand region). AM fungal root colonization, sporulation and physico-chemical edaphic properties during this period were determined and compared to evaluate the dynamics of response of wheat towards the AMF along crop maturation. Maximum AMF root colonization recorded was 54.3% indicating that AMF, particularly in low phosphorus (P) soils, can be important even in case of less responsive crop like wheat. In the two out of four sites studied, the AMF spore density increased with the increase in soil temperature. Absence of this type of pattern in remaining two sites indicated that site-specific environmental and agricultural conditions may affect the degree of wheat response to AMF. It also suggested that AMF communities inhabiting agroecosystems may exhibit considerable temporal sporulation patterns. The maximum AMF colonization was observed during February-March 2008, whereas maximum AMF sporulation was noticed during March-April 2008. Statistically significant negative correlation of AMF spore density with pH, organic carbon (OC) and available P was observed in the one of the sites studied. Overall assessment of the data indicated that season and location significantly affected the interaction of AM fungi with winter wheat necessitating the further need to understand the ecology of AMF populations with reference to specific host species under different micro-climatic conditions of Bundelkhand region.

译文

在这项研究中,我们调查了印度中部Bundelkhand地区某些小麦种植区的丛枝菌根 (AM) 真菌的短期时间变化模式和理化特性。从2007年12月到2008年5月,每个月都会从Jhansi (Bundelkhand地区) 周围的四个小麦种植场收集根际土壤样品。确定了这一时期的AM真菌根定植,孢子形成和理化性质,并进行了比较,以评估小麦在作物成熟过程中对AMF的响应动态。记录的最大AMF根系定植是54.3% 的,表明AMF,特别是在低磷 (P) 土壤中,即使在响应较小的作物 (如小麦) 的情况下,也可能是重要的。在研究的四个站点中的两个站点中,AMF孢子密度随土壤温度的升高而增加。在其余两个站点中没有这种类型的模式表明,特定站点的环境和农业条件可能会影响小麦对AMF的响应程度。它还表明,居住在农业生态系统中的AMF群落可能表现出相当大的时间孢子形成模式。在2008年2月到3月期间观察到最大的AMF定植,而在2008年3月到4月期间观察到最大的AMF孢子形成。在研究的位点之一中观察到AMF孢子密度与pH,有机碳 (OC) 和有效磷的统计学显着负相关。对数据的总体评估表明,季节和位置显着影响了AM真菌与冬小麦的相互作用,因此有必要进一步了解Bundelkhand地区不同微气候条件下特定寄主物种的AMF种群生态学。

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