Results 91 to 100 of about 1,485 (125)

Assessing Negative and Positive Phototropism in Lianas

Methods in Molecular Biology, 2019
By the nineteenth century, root climbers and adhesive-tendril climbers were known to exhibit negative phototropism. Negative phototropism is shared by various plant species belonging to many taxonomic families and is considered to be an outcome of parallel evolution.
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Phototropin2-mediated hypocotyl phototropism is negatively regulated by JAC1 and RPT2 in Arabidopsis

Plant Physiology and Biochemistry, 2021
Hypocotyl phototropism is redundantly mediated by phot1 and phot2, two blue light receptor phototropins, under the intensity of blue light>1 μmol m-2 s-1. As light intensity increases, phot1 inhibits the phot2-mediated response. To date, only Arabidopsis Root Phototropism2 (RPT2) has been shown to participate in phot1-mediated inhibition of ...
Jindong, Zhu, Jing, Wang, Yuanyuan, Sheng, Yan, Tian, Yueyue, Zhang, Chanjuan, Zhou, Xiang, Zhao, Xiao, Zhang   +7 more
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Negative Phototropism of Phycomyces in the Ultra-violet

Nature, 1957
IN the course of a study of the growth and curvature of the sporangiophores of Phycomyces, the phototropic sensitivity was re-examined. Preliminary experiments showed that unfiltered green light, isolated from a General Electric H85C3 capillary mercury lamp by a Bausch and Lomb grating monochromator with quartz optics, caused very marked negative ...
G M, CURRY, H E, GRUEN
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UV susceptibility and negative phototropism of dermatophytes

Mycoses, 1995
Summary. High doses of ultraviolet radiation (UVR) have well‐known inhibitory effects upon dermatophytes. In the present study, the effect of repetitive low doses of UVR on mycelial growth of dermatophytes was tested. Pellets of Trichophyton rubrum, T.
J. Brasch, Anne Menz
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Negative phototropism of rice root and its influencing factors

Science in China Series C, 2002
Some characteristics of the rice (Oryza sativa L.) root were found in the experiment of unilaterally irradiating the roots which were planted in water: (i) All the seminal roots, adventitious roots and their branched roots bent away from light, and their curvatures ranged from 25 degrees to 60 degrees .
Zhong, Wang, Yiwei, Mo, Shanqin, Qian, Yunjie, Gu   +3 more
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Negative phototropic response of rhizoid cells in the fern Adiantum capillus-veneris

Journal of Plant Research, 2006
In general, phototropic responses in land plants are induced by blue light and mediated by blue light receptor phototropins. In many cryptogam plants including the fern Adiantum capillus-veneris, however, red as well as blue light effectively induces a positive phototropic response in protonemal cells. In A.
Hidenori, Tsuboi, Noriyuki, Suetsugu, Masamitsu, Wada   +2 more
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UV susceptibility and negative phototropism of dermatophytes.

Mycoses, 1996
High doses of ultraviolet radiation (UVR) have well-known inhibitory effects upon dermatophytes. In the present study, the effect of repetitive low doses of UVR on mycelial growth of dermatophytes was tested. Pellets of Trichophyton rubrum, T. mentagrophytes and Microsporum canis were placed between two thin layers of Sabouraud glucose agar.
J, Brasch, A, Menz
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Negative shoot phototropism in a climber and an epiphyte

Biotropica
AbstractWhen a root‐climber Ficus pumila and an epiphyte Peperomia quadrangularis were exposed to a light gradient, over 90% of the shoots grew away from light. This is the first demonstration of negative phototropism in these species. Whereas negative phototropism may help climbers locate support, its function in epiphytes remains uncertain.
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Negative phototropism of the shoots helps temperate liana Hedera helix L. to locate host trees under habitat conditions

Tree Physiology, 2023
Abstract 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 toward darker areas or objects, in one case including actual tree trunks.
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NEGATIVE PHOTOTROPISM OF THE HAPTERA OF ALARIA ESCULENTA (LAMINARIALES)^1,2

Journal of Phycology, 1974
SUMMARYThe “root‐like” haptera of the holdfast of Alaria esculenta (L.) Grev. display a negative phototropic curvature only when unilaterally irradiated with blue (432 nm) and green (552 nm) wavelengths.
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