lecture 17 : Plants and Microbes 1
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26 Terms
what is the most famous microbiome in agriculture
the animal kingdom
how many microbes do cows have and why
13 trillion since grass digestion is hard so they have multiple stomachs to help digestion
how many microbes are in 1 teaspoon of soil
100 million to 1 billion bacteria
what is the soil around the root system called
rhizosphere
what do plants cultivate within the rhizosphere
a population of friendly microbes
microbes in the rhizosphere _____ roots easily
invade
what is bacteria in the rhizosphere called
rhizobium
what is are functions that rhizobium do
phosphate solubilization and sulfur oxidation
enhance mineral uptake
protact against metal toxicity
nitrogen fixation
what does rhizobium do for phosphate and sulfur in plants
phosphate and sulfter are needed for plants but in many soils are hard for roots to uptake without conversion to the correct chemical form
simple way of saying what rhizobium does to phosphates and sulfur
makes them digestible by plants
what does rhizobium produce to enhance mineral uptake
siderophores
what do siderophores do
harvest iron from soil to provide to plants
what are toxic metal having soils
serpentine soils
different soils have different
biomes
what do nickel rich plants help with
restoring destroyed mines
what bacteria helps nickel rich plants restore destroyed mines
phytoremediation
where do legumes house rhizobium
special roots called nodules
what enzyme converts atmospheric nitrogen to be usable by legumes
iron rich nitrogenase
what is the color when fixating nitrogen
pink like
what does rhizobium convince legumes to do
feed it more sugar
what is the most commonly deficient nutrient for plants
nitrogen
what does growing legumes as cover crops do
increase nitrogen in soil content for future growth
how is nitrogen deficient despite being abundant in the atmosphere
hard for enzymes to use
what do cycads to
release chemicals to convince cyanobacteria to invade their roots
what does cyanobacteria do
fixes nitrogen from atmosphere for host cycad
what is an azolla
tiny aquatic fern that hosts cyano