Growth and physiology of the citrange ‘Fepagro C37 Reck’ rootstock innoculated with arbuscular mycorrhizal fungi

Abstract

The use of arbuscular mycorrhizal fungi (AMF) in the production of rootstocks is a strategy to promote faster plant growth. However, this response depends on the symbiont species. The objective of this study was to evaluate the influence of different species of arbuscular mycorrhizal fungus (AMF) on the development and physiology of citrange 'Fepagro C37 Reck' rootstock. Four species of AMF were used in the experiment: Scutellospora heterogama, Gigaspora margarita, Glomus etunicatum, and Acaulospora sp., and a control treatment. The experiment was arranged in a randomized blocks design, with 5 treatments, 3 replicates, and 10 plants per plot. Every 15 days, height (cm) and stem diameter (mm) of plants were measured in the nursery. At 330 days, the number of leaves, leaf area (cm²), fresh and dry mass of roots and shoot (g/plant), root and shoot reserve content, and AMF colonization were evaluated. The AMF inoculation promoted an accelerated vegetative growth, resulting in greater height and diameter. The fungi also promoted greater absorption of most of the nutrients and increase in all other parameters evaluated. However, no effect was found on the reserve content of the rootstock. Roots were colonized with moderate presence of arbuscules and low presence of vesicles. AMF, regardless of species, influence the development and physiology of the citrange 'Fepagro C37 Reck' rootstock.

Interactions between nitrogen fertilization with the growth and leaf macronutrients of citrus rootstocks

“…Near this temperature, the photosynthesis rate in too small or even zero if below 10 ºC, whereas the range of temperatures at which the photosynthesis is more intense is between 20 to 30 ºC (KOLLER, 2006). This behavior was also found by Back et al (2018), where they tested the vegetative development of plants of the citrange Fepagro C37…”

“…In seedling production, one of the objectives is to make the rootstock reach the diameter-to-graft as fast as possible (the minimum diameter should be 7 mm at a 10-cm height) because it allows an anticipation of the grafting, thereby generating a new plant (BACK et al, 2018;RIETH et al, 2012). However, the plant should be produced with care to develop a well-developed root system.…”