From dark to darkness, negative phototropism influences the support-tree location of the massive woody climber<i>Hydrangea serratifolia</i>(Hydrangeaceae) in a Chilean temperate rainforest

Rodriguez-Quintero, W. David; Moreno-Chacón, María; Carrasco-Urra, Fernando; Saldaña, Alfredo

doi:10.1080/15592324.2022.2122244

Plant Signaling & Behavior

2022

DOI: 10.1080/15592324.2022.2122244

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From dark to darkness, negative phototropism influences the support-tree location of the massive woody climberHydrangea serratifolia(Hydrangeaceae) in a Chilean temperate rainforest

W. David Rodriguez-Quintero

María Moreno-Chacón

Fernando Carrasco-Urra

et al.

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2023

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Negative phototropism of the shoots helps temperate liana Hedera helix L. to locate host trees under habitat conditions

Wyka

2023

Tree Physiology

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Lianas employ a variety of searching mechanisms to find support, however it is not clear, to what extent environmental signals are used to help direct the search. Several adventitious-root climbers have been shown to bend away from light and grow towards darker areas or objects, in one case including actual tree trunks. In the literature, this negative phototropism (NP) has been informally and inconsistently reported also from a temperate root climber Hedera helix (common ivy). In this study, rigorous laboratory tests have confirmed the occurrence of NP in both seedlings and prostrate shoots of H. helix. Furthermore, a field experiment with potted ivy seedlings placed around tree trunks demonstrated their ability to remotely locate trees. This finding was corroborated by a survey of growth directions in wild-growing prostrate ivy shoots in two woodland habitats. Moreover, in an outdoor experiment, artificial support location by ivy was inhibited by high solar irradiance. These results show that H. helix uses NP to locate support and indicate that this ability is a component of the species’ shade escape strategy.

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Negative phototropism of the shoots helps temperate liana Hedera helix L. to locate host trees under habitat conditions

Wyka

2023

Tree Physiology

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From dark to darkness, negative phototropism influences the support-tree location of the massive woody climberHydrangea serratifolia(Hydrangeaceae) in a Chilean temperate rainforest

Cited by 1 publication

References 165 publications

Negative phototropism of the shoots helps temperate liana Hedera helix L. to locate host trees under habitat conditions

Negative phototropism of the shoots helps temperate liana Hedera helix L. to locate host trees under habitat conditions

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