Indole-3-Acetic Acid Controls Cambial Growth in Scots Pine by Positional Signaling. Uggla, C., Mellerowicz, E. J, & Sundberg, B. Plant Physiology, 117(1):113–121, May, 1998. ![Indole-3-Acetic Acid Controls Cambial Growth in Scots Pine by Positional Signaling [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper abstract bibtex The vascular cambium produces secondary xylem and phloem in plants and is responsible for wood formation in forest trees. In this study we used a microscale mass-spectrometry technique coupled with cryosectioning to visualize the radial concentration gradient of endogenous indole-3-acetic acid (IAA) across the cambial meristem and the differentiating derivatives in Scots pine (Pinus sylvestris L.) trees that had different rates of cambial growth. This approach allowed us to investigate the relationship between growth rate and the concentration of endogenous IAA in the dividing cells. We also tested the hypothesis that IAA is a positional signal in xylem development (C. Uggla, T. Moritz, G. Sandberg, B. Sundberg [1996] Proc Natl Acad Sci USA 93: 9282–9286). This idea postulates that the width of the radial concentration gradient of IAA regulates the radial number of dividing cells in the cambial meristem, which is an important component for determining cambial growth rate. The relationship between IAA concentration in the dividing cells and growth rate was poor, although the highest IAA concentration was observed in the fastest-growing cambia. The radial width of the IAA concentration gradient showed a strong correlation with cambial growth rate. The results indicate that IAA gives positional information in plants.
@article{uggla_indole-3-acetic_1998,
title = {Indole-3-{Acetic} {Acid} {Controls} {Cambial} {Growth} in {Scots} {Pine} by {Positional} {Signaling}},
volume = {117},
issn = {0032-0889},
url = {https://www.ncbi.nlm.nih.gov/pmc/articles/PMC34994/},
abstract = {The vascular cambium produces
secondary xylem and phloem in plants and is responsible for wood
formation in forest trees. In this study we used a microscale
mass-spectrometry technique coupled with cryosectioning to visualize
the radial concentration gradient of endogenous indole-3-acetic acid
(IAA) across the cambial meristem and the differentiating derivatives
in Scots pine (Pinus sylvestris L.) trees that had
different rates of cambial growth. This approach allowed us to
investigate the relationship between growth rate and the concentration
of endogenous IAA in the dividing cells. We also tested the hypothesis
that IAA is a positional signal in xylem development (C. Uggla, T.
Moritz, G. Sandberg, B. Sundberg [1996] Proc Natl Acad Sci USA 93:
9282–9286). This idea postulates that the width of the radial
concentration gradient of IAA regulates the radial number of dividing
cells in the cambial meristem, which is an important component for
determining cambial growth rate. The relationship between IAA
concentration in the dividing cells and growth rate was poor, although
the highest IAA concentration was observed in the fastest-growing
cambia. The radial width of the IAA concentration gradient showed a
strong correlation with cambial growth rate. The results indicate that
IAA gives positional information in plants.},
number = {1},
urldate = {2024-10-02},
journal = {Plant Physiology},
author = {Uggla, Claes and Mellerowicz, Ewa J and Sundberg, Björn},
month = may,
year = {1998},
pages = {113--121},
}
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