Intracellular Photoreceptive Site for Polarotropism in Protonema of the Fern Adiantum capillus-veneris L.
Intracellular Photoreceptive Site for Polarotropism in Protonema of the Fern Adiantum capillus-veneris L.
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DOI：
10.1093/oxfordjournals.pcp.a076301
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发表时间：
1981-12
影响因子：
4.9
通讯作者：
M. Wada;A. Kadota;M. Furuya
中科院分区：
文献类型：
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作者：
M. Wada;A. Kadota;M. Furuya
用偏振光短期照射蕨单细胞原丝体，诱导其产生向极反应。在红光下顶部生长6天，然后在黑暗中生长15小时。用延时录像系统连续观察根尖生长，结果表明，根尖生长方向在短暂照射后30 min内发生变化。微束照射原丝体近顶端、顶端侧边、5-15 μm区域的偏振光红光诱导的向极反应最有效。当用不同能量密度的偏振红光同时照射两侧时，如果能量比B/A（B：给予原丝体在向极性中应向其弯曲的一侧的能量，A：给予另一侧的能量）不小于1/2，则向极性正常发生。但是，如果该比值小于该值，则原丝体不再表现出向极性，而是根据两侧注量的差异而向注量高的一侧生长。
Polarotropic response was induced by short-term irradiation with polarized red light in single-celled protonemata of the fernAdiantum capillus-venerisL. that had been grown apically under red light for 6 days then for 15 hr in the dark. Sequential observation of the apical growth with a time-lapse video system showed that the direction of apical growth changed within 30 min after the brief irradiation. Microbeam irradiation with polarized red light of the subapical, dark-grown flank of the apical, 5–15 μm region of the protonema induced the polarotropic response most effectively. When both sides of the flank were irradiated simultaneously with different fluences of polarized red light with the same vibrating plane of 45° with protonemal axis, polarotropism took place normally, if the fluence ratio, B/A (B: fluence given to the side toward which the protonema should bend in polarotropism, A: fluence given to the other side) was not less than one-half. But, if the ratio became less than that, the protonemata no longer showed polarotropism, they grew toward the side of higher fluence depending on the difference in fluences between both sides.