NDLI: Seed priming with Trichoderma harzianum isolates enhances plant growth and induces resistance against Plasmopara halstedii, an incitant of sunflower downy mildew disease

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Seed priming with Trichoderma harzianum isolates enhances plant growth and induces resistance against Plasmopara halstedii, an incitant of sunflower downy mildew disease

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Australasian Plant Pathology : Volume 41, Issue 5, September 2012

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Seed priming with Trichoderma harzianum isolates enhances plant growth and induces resistance against Plasmopara halstedii, an incitant of sunflower downy mildew disease

Content Provider	Springer Nature Link
Author	Nagaraju, A. Sudisha, J. Murthy, S. Mahadeva Ito, Shin ichi
Copyright Year	2012
Abstract	Three rhizosphere fungal isolates viz., PGPFYCM-2, PGPFYCM-8 and PGPFYCM-14 of Trichoderma harzianum, applied as seed treatment to a highly susceptible sunflower cultivar were evaluated for their ability to promote growth and induce resistance in sunflower against downy mildew disease caused by Plasmopara halstedii. Treatment of sunflower seeds with both conidial suspension (1 × 10$^{8}$ spores ml$^{−1}$) and talc formulations (2.1 × 10$^{7}$ spores g$^{−1}$) at 8 g kg$^{−1}$ seeds and 10 g kg$^{−1}$ seeds, significantly promoted growth and reduced disease incidence under both greenhouse and field conditions. Among the treatments, PGPFYCM-14 (1 × 10$^{8}$ spores ml$^{−1}$) was highly significant (P = 0.05) in inducing resistance of 63 and 69 %, followed by PGPFYCM-2 which offered 41 and 42 % disease protection under greenhouse and field conditions respectively. Formulation treatments of PGPFYCM-14 also protected the plants significantly (P = 0.05) when compared to the untreated control. There was a significant increase in NPK macronutrients uptake in all the treated plants compared to the untreated control and maximum NPK uptake was observed with PGPFYCM-14 (1 × 10$^{8}$ spores ml$^{−1}$). Under in vitro conditions, all the tested isolates expressed increase in seed germination and vigour index over the control. Tested plant growth promoting fungal (PGPF) isolates remain significant in enhancing vegetative and reproductive growth parameters, including plant height, early flowering, reduced crop duration, ear head size and crop yield under field conditions when compared to the untreated control.
Starting Page	609
Ending Page	620
Page Count	12
File Format	PDF
ISSN	08153191
Journal	Australasian Plant Pathology
Volume Number	41
Issue Number	6
e-ISSN	14486032
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-10-09
Publisher Institution	Australasian Plant Pathology Society
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sunflower Downy mildew Plasmopara halstedii PGPF Trichoderma harzianum Growth promotion Resistance Agriculture Plant Sciences Ecology Plant Pathology Entomology
Content Type	Text
Resource Type	Article
Subject	Plant Science

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Seed priming with Trichoderma harzianum isolates enhances plant growth and induces resistance against Plasmopara halstedii, an incitant of sunflower downy mildew disease

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Seed priming with Trichoderma harzianum isolates enhances plant growth and induces resistance against Plasmopara halstedii, an incitant of sunflower downy mildew disease