NDLI: Does An Asexual Endophyte Symbiont Alter Life Stage and Long-Term Survival in a Perennial Host Grass?

Content Provider	Springer Nature Link
Author	Faeth, Stanley H. Hamilton, Cyd E.
Copyright Year	2006
Abstract	Asexual, seedborne endophytic fungi in perennial grasses are often viewed as strong mutualists because fitness of the symbiont and host grass are closely coupled. However, at least for some native grasses, the asexual endophyte, Neotyphodium, acts parasitically, yet remains at high frequencies in natural populations. Most previous studies of Neotyphodium effects on host survival have been short term relative to the long life span of the perennial grass host. We therefore tested the hypothesis that Neotyphodium alters the survival in various life stages and long-term survival of adult native Arizona fescue (Festuca arizonica). To test the former, we planted 40 infected (E+) and 40 uninfected (E−, endophyte removed) seeds from four different maternal plants in the field under ambient conditions. We followed survival of seeds, seedlings, and adult plants over a 5-year period. To test the latter, we determined the infection of 1633 adult plants and followed their survival over the next 5–7 years. E+ seeds did not differ from uninfected seeds in terms of overall survival from seed germination to seedling to adult. However, the shape of the survival curve differed, with E+ plants showing higher mortality in early life stages. E+ adult plants did not differ from E− plants in long-term survival. Survival was generally very high during the study, which included a severe and prolonged drought. Infection by asexual Neotyphodium does not increase survival in early life stages or that of adult plants. Because asexual, vertically transmitted symbionts are predicted by evolutionary theory to be strong mutualists, the persistence of high infection frequencies in natural populations without long-term benefits to the host remains enigmatic. One possible explanation is that the long life span of the perennial host and low seedling recruitment may obscure either the costs or benefits of endophyte infection.
Starting Page	748
Ending Page	755
Page Count	8
File Format	PDF
ISSN	00953628
Journal	Microbial Ecology
Volume Number	52
Issue Number	4
e-ISSN	1432184X
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-08-31
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Nature Conservation Geoecology/Natural Processes Ecology Microbiology
Content Type	Text
Resource Type	Article
Subject	Soil Science Ecology Ecology, Evolution, Behavior and Systematics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Genetic Diversity and Structure of Neotyphodium Species and Their Host Achnatherum sibiricum in a Natural Grass–Endophyte System

Host-symbiont recognition in the environmentally transmitted sepiolid squid-Vibrio mutualism

Occurrence and Genetic Structure of the Systemic Grass Endophyte Epichloë festucae in Fine Fescue Populations

Hybridization in Endophyte Symbionts Alters Host Response to Moisture and Nutrient Treatments

Asexual Endophytes in a Native Grass: Tradeoffs in Mortality, Growth, Reproduction, and Alkaloid Production

Fungal Symbionts Alter Plant Drought Response

Soil Microbial Community Associated with an Invasive Grass Differentially Impacts Native Plant Performance

Temperature Determines Symbiont Abundance in a Multipartite Bark Beetle-fungus Ectosymbiosis

Microbial Responses to Long-Term N Deposition in a Semiarid Grassland

Does An Asexual Endophyte Symbiont Alter Life Stage and Long-Term Survival in a Perennial Host Grass?

Similar Documents

Genetic Diversity and Structure of Neotyphodium Species and Their Host Achnatherum sibiricum in a Natural Grass–Endophyte System

Host-symbiont recognition in the environmentally transmitted sepiolid squid-Vibrio mutualism

Occurrence and Genetic Structure of the Systemic Grass Endophyte Epichloë festucae in Fine Fescue Populations

Hybridization in Endophyte Symbionts Alters Host Response to Moisture and Nutrient Treatments

Asexual Endophytes in a Native Grass: Tradeoffs in Mortality, Growth, Reproduction, and Alkaloid Production

Fungal Symbionts Alter Plant Drought Response

Soil Microbial Community Associated with an Invasive Grass Differentially Impacts Native Plant Performance

Temperature Determines Symbiont Abundance in a Multipartite Bark Beetle-fungus Ectosymbiosis

Microbial Responses to Long-Term N Deposition in a Semiarid Grassland

Does An Asexual Endophyte Symbiont Alter Life Stage and Long-Term Survival in a Perennial Host Grass?