The leaf, rhizome, and root tissues were separated, dried to a constant weight (60 C) and ground to pulverized samples. The powdered samples were digested in duplicate using the sulfuric acidhydrogen peroxide method for N and P content determination . The N content was then determined using an N analyzer (BUCHI Auto Kjeldahl Unit K-300), and the P content
was analyzed through a colorimetric method . The measurements of the FAA contents were performed using ninhydrin method.