Natural occurrence of Fusarium species, fumonisin production by toxigenic strains, and concentrations of fumonisins B1, and B2 in conventional and organic maize grown in Spain.

نویسندگان

  • Agustín Ariño
  • Teresa Juan
  • Gloria Estopañan
  • José F González-Cabo
چکیده

Sixty samples of corn from both conventional and organic farms were tested for internal fungal contamination. Molds were identified to genus, and those belonging to the genus Fusarium were identified to species. Twenty isolates of Fusarium verticillioides were tested with a high-performance liquid chromatography-naphthalene dicarboxaldehyde-fluorescence method for their ability to produce fumonisins B1 and B2. The internal fungal infection in organic maize (63.20%) was significantly higher than that in conventional maize (40.27%) (P < 0.05). However, the distribution of fungal genera indicated a significantly higher prevalence of Fusarium in conventional (34.93%) than in organic (18.15%) maize, making Fusarium the predominant fungus in conventional maize. This difference in mold distribution between organic and conventional maize was attributed to the difference in cultivation system. The dominant Fusarium species in both conventional and organic samples was F. verticillioides. There were no significant differences in the ability of 20 selected isolates of F. verticillioides to produce fumonisins on conventional or organic corn. Up to 13.3% of the conventional corn samples contained fumonisins B1 and B2 at mean concentrations of 43 and 22 ng/g, respectively. Organic corn samples had somewhat lower levels of contamination: 35 ng/g fumonisin B1 and 19 ng/g fumonisin B2 (P > 0.05). The organic farming system, with well-balanced crop rotation, tillage, and compost fertilization, produced corn that was less likely to be contaminated with Fusarium species, although no significant difference in fumonisin concentrations was found between the two types of contaminated corn.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Occurrence of Fusarium spp. and Fumonisins in Stored Wheat Grains Marketed in Iran

Wheat grains are well known to be invaded by Fusarium spp. under field and storage conditions and contaminated with fumonisins. Therefore, determining Fusarium spp. and fumonisins in wheat grains is of prime importance to develop suitable management strategies and to minimize risk. Eighty-two stored wheat samples produced in Iran were collected from various supermarkets and tested for the prese...

متن کامل

Mycotoxins produced byFusarium species associated with maize ear rot in Iran

Mycotoxins contamination is one of the most important problems worldwide in maize that can cause serious threat for human and animal health. The aim of this study was to determine the ability of Fusarium species associated with maize ear rot to produce diverse mycotoxins. The results showed, One out of three isolates of F. subglutinans produced detectable level of beauvericin ...

متن کامل

Toxigenic potential of Fusarium species isolated from non-harvested maize.

The objective of this study was to determine the frequencies of distribution and the toxigenic potential of Fusarium species isolated from non-harvested maize left in field over winter in 1999 (N = 56) and 2003 (N = 56) in northern Croatia. Zearalenone and trichothecenes (DON, DAS, T-2) were isolated and detected using multitoxin extraction and TLC method. Modified TLC method was applied to det...

متن کامل

Detection of fumonisins produced in Fusarium moniliforme cultures by HPLC with electrospray MS and evaporative light scattering detectors.

A variety of toxic secondary metabolites including fumonisins, can be produced by the fungus Fusarium moniliforme and closely related species in section Liseola in large amounts (g/kg in laboratory cultures). Underivatized fumonisins were detected by HPLC using either an evaporative light scattering detector or electrospray MS. Electrospray MS used together with NMR and GC/MS was used to identi...

متن کامل

Investigation of the Loss of Parent Fumonisin Mycotoxins during Food Processing

During 2006 and 2007, a total of 64 Thai dried coffee bean samples (Coffeaarabica) from two growing sites in Chiangmai Province and 32 Thai dried coffeebean samples (Coffea canephora) from two growing sites in Chumporn Province,Thailand, were collected and assessed for fumonisin contamination by blackAspergilli. No Fusarium species known to produce fumonisin were detected, b...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Journal of food protection

دوره 70 1  شماره 

صفحات  -

تاریخ انتشار 2007