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The importance of the plant growth regulator auxin for plant growth
has long been recognized, even before the discovery of its chemical
structures in the early 20th century. Physiological studies in the
decades since have demonstrated that auxin is unidirectionally
transported in plants, a process dubbed polar auxin transport. It
is the polar auxin transport process that generates a local auxin
concentration gradient and regulates a broad array of physiological
and developmental processes. The discoveries of auxin transport
carrier proteins that mediate auxin influx into and efflux out of
transport-competent cells and auxin receptor proteins for auxin
signaling in the last few decades represent significant milestones
in auxin research and open up opportunities to probe the cellular
and molecular processes that regulate auxin transport and integrate
environmental cues with signaling processes. Remarkably, components
of the polar auxin transport machinery are present in both lower
plants such as mosses and higher plants including monocots and
eudicots, illustrating the key role of polar auxin transport in
plant evolution. This book highlights topics ranging from
physiological and genetic studies of polar auxin transport in plant
development, to growth responses to the environment and
plant-microbe interactions, to hormonal cross-talks with various
cellular and molecular regulatory processes essential for polar
auxin transport.
The importance of the plant growth regulator auxin for plant growth
has long been recognized, even before the discovery of its chemical
structures in the early 20th century. Physiological studies in the
decades since have demonstrated that auxin is unidirectionally
transported in plants, a process dubbed polar auxin transport. It
is the polar auxin transport process that generates a local auxin
concentration gradient and regulates a broad array of physiological
and developmental processes. The discoveries of auxin transport
carrier proteins that mediate auxin influx into and efflux out of
transport-competent cells and auxin receptor proteins for auxin
signaling in the last few decades represent significant milestones
in auxin research and open up opportunities to probe the cellular
and molecular processes that regulate auxin transport and integrate
environmental cues with signaling processes. Remarkably, components
of the polar auxin transport machinery are present in both lower
plants such as mosses and higher plants including monocots and
eudicots, illustrating the key role of polar auxin transport in
plant evolution. This book highlights topics ranging from
physiological and genetic studies of polar auxin transport in plant
development, to growth responses to the environment and
plant-microbe interactions, to hormonal cross-talks with various
cellular and molecular regulatory processes essential for polar
auxin transport.
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