System analysis of Phycomyces light-growth response. Photoreceptor and hypertropic mutants.
System analysis of Phycomyces light-growth response. Photoreceptor and hypertropic mutants.
复制标题
藻霉菌光生长反应的系统分析。
DOI：
10.1016/s0006-3495(86)83506-8
复制
发表时间：
1986
影响因子：
3.4
通讯作者：
Lipson,ED
中科院分区：
文献类型：
--
作者：
Palit,A;Pratap,P;Lipson,ED
用系统识别的正弦曲线和法研究了madB、madC和madH基因缺陷的藻体行为突变体的光生长反应。这些突变体的修改的向光作用光谱已经表明它们改变了光感受器（P. Galland和E.D. Lipson，1985，Photochem.光生物学41：331）。在前两篇论文中，光生长响应系统的动力学模型被开发并应用于几个波长和温度下的野生型频率核。本突变体研究在波长477 nm下进行。madB和madC夜盲突变体的对数平均强度为6 × 10（-2）W m-2，madH高嗜性突变体的对数平均强度为10（-4）W m-2。延长的光生长反应的madB和madC突变体反映在其频率内核的动态顺序减少。高嗜性突变体的线性响应基本正常，但其非线性行为显示出修改的动态。这些突变体的行为可以通过适当修改系统的参数模型来解释。这些修改一起支持的假设，一个综合的复合物介导的光响应和其他响应的孢子囊柄的感觉转导。
The light-growth responses of Phycomyces behavioral mutants, defective in genes madB, madC, and madH, were studied with the sum-of-sinusoids method of system identification. Modified phototropic action spectra of these mutants have indicated that they have altered photoreceptors (P. Galland and E.D. Lipson, 1985, Photochem. Photobiol. 41:331). In the two preceding papers, a kinetic model of the light-growth response system was developed and applied to wild-type frequency kernels at several wavelengths and temperatures. The present mutant studies were conducted at wavelength 477 nm. The log-mean intensity was 6 X 10(-2)W m-2 for the madB and madC night-blind mutants, and 10(-4)W m-2 for the madH hypertropic mutant. The prolonged light-growth responses of the madB and madC mutants are reflected in the reduced dynamic order of their frequency kernels. The linear response of the hypertropic mutant is essentially normal, but its nonlinear behavior shows modified dynamics. The behavior of these mutants can be accounted for by suitable modifications of the parametric model of the system. These modifications together support the hypothesis that an integrated complex mediates sensory transduction in the light responses and other responses of the sporangiophore.