Research Regarding the Effect of Arbuscular Mycorrhiza upon Principals Physiological Index in Salad - Lactuca sativa L.

Abstract

The mushrooms of vesicular arbuscular mycorrhiza have a positive influence in the most crops physiology, vegetative propagation by promoting increased between absorption of phosphorus, of microelements with difficult absorption for plant with reduced mobility and water, causing increased resistance to drought. Research was focused on the effect of arbuscular mycorrhiza upon chlorophyll content, leaf area and photosynthesis intensity in salad. Biological material used was the commercial genotypes of lettuce (Lactuca sativa L.), with Hungarian origin. To induce mycorrhiza was used commercially inoculums under the name of INOQ Top from INOQ GmbG, Germany. It contains the following species of fungi: Glomus etunicatum (Becker & Gerdemann), Glomus intraradices (Schenck & Smith), Glomus claroideum (Schenck & Smith). Chlorophyll content was measured using portable clorophyllmeter Spades 502, Konika Minolta, leaf area was determined with a portable scanner Leaf Area Meter AM 300-0002, Bioscientific ADC Ltd, and to measure the intensity of photosynthesis we used CO2 ANALYSIS PACKAGE device, qubit Systems (Canada), which incorporates an infrared gas analyzer to measure CO2 concentration. Chlorophyll content and hence CIC (chlorophyll content index) responded similarly to AMF colonization, ascertaining the higher values for phosphorus concentration variations in mycorrhiza 1X (0,43g/l Ca3 (PO4)2) and 0,5X (0,215 g/l Ca3(PO4)2).