lec 5 - global change on mycorrhizal symbioses

jake nash guest lecture

symbiosis

“the living together of unlike organisms”

• long term

• positive/negative effects

mycorrhizae

nutrient exchange symbiosis

• essential for plant growth and survival

• assist in uptake of nutrients from soil

• 10-100s of species on a single plant

mykes - fungus

rhiza - root

movement of nutrients in mycorrhizae

fungus uses its hyphae to go out into soil and scavenge N P K and gives it to the plant, plant photosynthesizes and gives sugar to fungus

ectomycorrhizal morphology

root colonizers

SPUN

society for the protection of underground networks

A global effort to map the planet’s fungi and advocate for their protection

biodiversity responses to climate change

negative effects of climate change on biodiversity have been well documented in plants and animals

invasion biology

study of the introduction of non-native species to ecosystems

invasion biology - pines in australia

pines wouldnt grow no matter how they planted them

introduced mycorrhizal fungi to make them grow (invasive)

worked! pines grew!

then pines AND FUNGI escaped the plantations - dominant plant in aus is eukalyptus

takeaways

mycorrhizal symbiosis are

• affected by global changes

• exacerbate/increase severity of existing global changes (via invasion)

• determine the effects of global change on plants/