Role of endophytes in early seedling growth of plants: a test using systemic fungicide seed treatment

Vasanthakumari, MM and Shridhar, Jambagi and Madhura, RJ and Nandhitha, Mohanasundaram and Kasthuri, Chinnasamy and Janardhana, B and Nataraja, KN and Ravikanth, G and Uma Shaanker, R (2019) Role of endophytes in early seedling growth of plants: a test using systemic fungicide seed treatment. Plant Physiology Reports, 24 (1). pp. 86-95.

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Abstract

Systemic fungicide seed treatments are routinely used in conventional agriculture to control soil and seedborne diseases, but little is known about their unintended adverse effects on non-target beneficial fungal endophytes that are known to be involved in plant growth and development. This study evaluated the seed treatment effect of a broad spectrum systemic fungicide, carbendazim (bavistin) on symbiotic association of fungal endophytes in rice and on early seedling growth of rice, green gram, soybean, and cowpea. Seeds were surface sterilized with sodium hypochlorite followed by 0.2% bavistin treatment. Growth of fungal endophytes was significantly affected by the seed treatment with fungicide in rice seedlings, while shoot and root growth was suppressed in all the crops. Quantitative real time PCR showed that the level of expression of two basal transcriptional regulator genes, OsBTF3 and OsNFYC1 that are required for seed germination and seedling growth significantly decreased in bavistin treated rice seedlings. Re-inoculation of consortia of fungal endophytes onto bavistin treated rice seedlings significantly recovered seedling growth and development. These results suggest that fungicide treatment of seeds affects early seedling growth and has negative impact on beneficial fungal endophytes that are involved in plant growth and development. This study provides information on possible ill effects of fungicide on beneficial fungal endophytes that play key roles in early seedling growth of plants and also open up the prospect to additional research on different crops in vitro and field conditions to determine the consequences of fungicide effects and optimise fungicide application strategies to develop sustainable disease control methods.

Item Type: Article
Additional Information: Copyright of this article belongs to Indian Society for Plant Physiology
Uncontrolled Keywords: Fungal endophytes; Seedling growth; Seed treatment; Bavistin; Fungicide
Subjects: C Publications by ATREEians > G Journal Papers
Divisions: Publications by ATREEians > Journal Papers
Depositing User: The Library Officer
Date Deposited: 20 May 2019 06:43
Last Modified: 20 May 2019 06:43
URI: http://eprints.atree.org/id/eprint/612

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