我们在形成花蕾的 microalga Chaetoceros curvisetus 的光合作用上调查了弄干的 macroalga Gracilaria lemaneiformis (Rhodophyta ) 的效果。C。curvisetus 与弄干的 G 的不同数量是有教养的。在控制实验室条件下面的 lemaneiformis。我们测量了光合的氧进化率并且建立了叶绿素荧光短暂(OJIP ) 曲线结合了它的特定的参数。我们观察了在弄干的 G 之间的集中依赖者和时间依赖者关系。在 C 的光合作用的 lemaneiformis 和抑制。curvisetus。有弄干的 G 的合作文化。lemaneiformis 也在 C 处于浸透光的最大的光合的氧进化率(P 最大) 导致了减少。在 OJIP 的 curvisetus,和减少与它的特定的参数一起弯; PSII ( F v / F m )的最大的光化学的效率,活跃 PSII 反应的数量在 t=0 和 t=t FM 每激动的生气的节集中( RC/CS0 和 RC/CSm ,分别地),吸收流动每在 t =0 (ABS/ CS0 )的激动的生气的节,并且套住的激子与移动一个电子进电子运输链( 0 )的效率。黑暗呼吸率(R d ) 在 C 增加了。与弄干的 G co 有教养的 curvisetus。lemaneiformis。JIP 测试和氧进化结果显示了那弄干的 G。lemaneiformis 减少了活跃反应中心的数字,堵住了电子运输链,并且损坏了 C 的演变氧的建筑群。curvisetus。这结果显示那弄干 G 的碎片。lemaneiformis 能有效地禁止 C 的光合作用。curvisetus,并且这样,能用作一个功能的产品到控制并且减轻 C。curvisetus 开花。
We investigated the effects of dried macroalga Gracilaria lemaneiform (Rhodophyta) on photosynthesis of the bloom-forming microalga Chaetoceros curvisetus. C. curvisetus was cultured with different amounts of dried G. lemaneiformis under controlled laboratory conditions. We measured the photosynthetic oxygen evolution rate and established the chlorophyll a fluorescence transient (OJIP) curve coupled with its specific parameters. We observed concentration-dependent and time-dependent relationships between dried G. lemaneiformis and inhibition of photosynthesis in C. curvisetus. Co-culture with dried G. lemaneiformis also resulted in a decrease in the light-saturated maximum photosynthetic oxygen evolution rate (P~ax) in C. curvisetus, and a decrease in the OJIP curve along with its specific parameters; the maximum photochemical efficiency of PSII (FJFm), the amount of active PSII reaction centers per excited cross section at t=0 and t=--tFM (RC/CS0 and RC/CSm, respectively), the absorption flux per excited cross section at t=0 (ABS/ CS0), and the efficiency with which a trapped exciton moves an electron into the electron transport chain (~u0). The dark respiration rate (Rd) increased in C. curvisetus co-cultured with dried G. lemaneiformis. The JIP-test and the oxygen evolution results indicated that dried G. lemaneiJbrmis decreased the number of active reaction centers, blocked the electron transport chain, and damaged the oxygen-evolving complex of C. curvisetus. This result indicated that dried fragments of G. lemaneiformis could effectively inhibit photosynthesis of C. curvisetus, and thus, could serve as a functional product to control and mitigate C. curvisetus blooms.