Effect of root infection with <i>Pseudomonas fluorescens</i> and <i>Glomus mosseae</i> in improving Fe-efficiency of grapevine ungrafted rootstocks

Authors

  • L. Bavaresco
  • C. Fogher

DOI:

https://doi.org/10.5073/vitis.1992.31.163-168

Keywords:

chlorosis, grapevine, iron, Pseudomonas, VAM fungi

Abstract

Woody cuttings from three ungrafted rootstocks, with decreasing resistance to lime-induced chlorosis (V. berlandieri x V. rupestris 140 Ru; V. berlandieri x V. riparia SO 4; V. riparia x V. rupestris 101-14), were potted in unsterile calcareous soil with Pseudomonas fluorescens cells and Glomus mosseae inoculum to test the effects of these organisms on some physiological parameters involved in chlorosis occurrence. The most significant findings are:

  • (i) P. fluorescens and G. mosseae treatments increase ferrous iron and chlorophyll leaf content in the rootstock more susceptible to lime-induced chlorosis (101-14);
  • (ii) increased mycorrhizal colonization, over the control, enhances N, P, Mn and Cu concentration in leaf fresh matter.

Effetto dell'infezione radicale con Pseudomonas fluorescens e Glomus mosseae sulla nutrizione ferrica di portinnesti di vite non innestati

Talee legnose di tre genotipi portinnesto con resistenza decrescente alla clorosi da calcare (V. berlandieri x V. rupestris 140 Ru; V. berlandieri x V. riparia SO 4; V. riparia x V. rupestris 101-14) sono state coltivate in vaso su un terreno calcareo non sterilizzato, dopo aver infettato le radici con il battere Pseudomonas fluorescens ed il fungo micorrizico Glomus mosseae. L'obiettivo della ricerca era quello di controllare l'effetto di questi organismi sul manifestarsi del fenomeno clorotico, valutato mediante la misura del contenuto fogliare di clorofilla e di ferro ferroso. I risultati principali possono essere cosi sintetizzati:

  • (i) i trattamenti con il battere ed il fungo micorrizico hanno aumentato il tenore fogliare di ferro ferroso e di clorofilla nel genotipo piu sensibile alla clorosi da calcare (101-14);
  • (ii) la percentuale di infezione micorrizica e risultata correlata positivamente con Je concentrazioni fogliari di N, P, Mn e Cu.

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Published

2015-10-09

Issue

Vol. 31 No. 3 (1992): Vitis

Section

Article

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