Year: 2009

Angiosperm leaf vein evolution was physiologically and environmentally transformative.

Boyce CK, Brodribb TJ, Feild TS, Zwieniecki MA. 2009. Angiosperm leaf vein evolution was physiologically and environmentally transformative. Proceedings of the Royal Society of London Series B 276: 1771-1776.

The veins that irrigate leaves during photosynthesis are demonstrated to be strikingly more abundant in flowering plants than in any other vascular plant lineage. Angiosperm vein densities average 8 mm of vein per mm2 of leaf area and…

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Xylem hydraulic physiology: The functional backbone of terrestrial plant productivity

Brodribb TJ. 2009. Xylem hydraulic physiology: The functional backbone of terrestrial plant productivity. Plant Science 177(4): 245-251.

Land plants are completely dependent on a passive system of water transport for their survival. The great bulk of the xylemtissue is non-living and consequently has no short term capacity to acclimate or adjust to changes in hydraulic…

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Evolution of stomatal responsiveness to CO2 and optimization of water-use efficiency among land plants

Brodribb TJ, McAdam SAM, Jordan GJ, Feild TS. 2009. Evolution of stomatal responsiveness to CO2 and optimization of water-use efficiency among land plants. New Phytologist 183(3): 839-847.

The stomata of angiosperms respond to changes in ambient atmospheric concentrations of CO2 (Ca) in ways that appear to optimize water-use efficiency. It is unknown where in the history of land plants this important stomatal control mechanism evolved….

Giant Flowers of Southern Magnolia Are Hydrated by the Xylem

Feild TS, Chatelet DS, Brodribb TJ. 2009. Giant flowers of southern Magnolia are hydrated by the xylem. Plant Physiology 150(3): 1587-1597.

Flowering depends upon long-distance transport to supply water for reproductive mechanisms to function. Previous physiological studies suggested that flowers operated uncoupled from stem xylem transport and received water primarily from the phloem. We demonstrate that the water balance…

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Hydraulic Failure Defines the Recovery and Point of Death in Water-Stressed Conifers

Brodribb T.J. & Cochard H. (2009) Hydraulic Failure Defines the Recovery and Point of Death in Water-Stressed Conifers. Plant Physiology, 149, 575-584

This study combines existing hydraulic principles with recently developed methods for probing leaf hydraulic function to determine whether xylem physiology can explain the dynamic response of gas exchange both during drought and in the recovery phase after rewatering….

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Leaf hydraulics and drought stress: response, recovery and survivorship in four woody temperate plant speciespce_2023

Blackman CJ, Brodribb TJ, Jordan GJ, (2009) 'Leaf hydraulics and drought stress: response, recovery and survivorship in four woody temperate plant species', Plant, Cell and Environment, vol.32, pp 1584-1595

Efficient conduction of water inside leaves is essential for leaf function, yet the hydraulic-mediated impact of drought on gas exchange remains poorly understood. Here we examine the decline and subsequent recovery of leaf water potential (Yleaf), leaf hydraulic…

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angiosperm evolution Ancestral xerophobia: a hypothesis on the whole plant ecophysiology of early angiosperms

Feild TS, Chatelet DS, Brodribb TJ. 2009. Ancestral xerophobia: a hypothesis on the whole plant ecophysiology of early angiosperms. Geobiology 7(2): 237-264.

Today, angiosperms are fundamental players in the diversity and biogeochemical functioning of the planet. Yet despite the omnipresence of angiosperms in today’s ecosystems, the basic evolutionary understanding of how the earliest angiosperms functioned remains unknown. Here we synthesize…

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