INTERACTIVE EFFECTS OF NANO ZINC, AM FUNGI AND SELENOBACTERIA FOR SELENIUM BIOFORTIFICATION IN STRAWBERRY (Fragaria x ananassa Duch.)
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Date
2023-09-28
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Interactive effects of nano zinc, AM fungi and
selenobacteria for selenium biofortification in strawberry (Fragaria × ananassa Duch.)”
was carried out during two consecutive years 2020-21 and 2021-22 under protected
conditions, with the objectives to assess the impact of nanozinc, the viability of coinoculating
AMF and selenobacteria to increase Se content, as well as their potential
interactions on strawberry yield and quality. Eighteen treatment combinations arranged in a
randomized complete block design comprising two levels of AM fungi viz., without AM
fungi (AM0) and with AM fungi (AM1); three levels of selenobacteria namely, SeB0, SeB1
and SeB2 (without selenobacteria, Stenotrophomonas maltophilia and Alcaligenes faecalis,
respectively) and three levels of foliar nano zinc oxide viz., ZnO0, ZnO1 and ZnO2 (0, 100 and
200 ppm, respectively). The interaction of AM1 × SeB1 × ZnO1 i.e. plants rhizoinoculated
with AM fungi, selenobacterial strain Stenotrophomonas maltophilia and foliar application of
nano zinc oxide @ 100ppm, resulted in the highest cumulative fruit number (36.02 per plant),
fruit yield per plant (611.18 g) and yield efficiency (7.34 g/cm2 LA) in strawberry plants.
However, the above interaction also recorded, highest values of total soluble solids (10.46
˚Brix), titratable acidity (0.77%), total sugars (7.54%), fruit anthocyanin content (45.29
mg/100 ml) and fruit zinc content (36.40 ppm). Fruit phosphorus and selenium content
increased significantly as a result of the AM1 × SeB1 (i.e. AM fungi and selenobacterial strain
Stenotrophomonas maltophilia) with measured values of 0.37% and 0.80 μg/g, respectively.
Maximum values for acid phosphatase enzyme (151.03 g pNPP/g/ha soil) and alkaline
phosphatase enzyme (222.55 g pNPP/g/ha soil) were found in the strawberry field with the
interaction, AM1 × SeB1 × ZnO1.