CHLOROPLAST SYMBIOSIS IN A NON-ELYSIID MOLLUSK, COSTASIELLA-LILIANAE MARCUS (HERMAEIDAE, ASCOGLOSSA (=SACOGLOSSA) - EFFECTS OF TEMPERATURE, LIGHT-INTENSITY, AND STARVATION ON CARBON FIXATION RATE
CHLOROPLAST SYMBIOSIS IN A NON-ELYSIID MOLLUSK, COSTASIELLA-LILIANAE MARCUS (HERMAEIDAE, ASCOGLOSSA (=SACOGLOSSA) - EFFECTS OF TEMPERATURE, LIGHT-INTENSITY, AND STARVATION ON CARBON FIXATION RATE
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DOI：
10.2307/1540899
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发表时间：
1981-01-01
影响因子：
1.6
通讯作者：
FERMIN, C
中科院分区：
文献类型：
--
作者：
CLARK, KB;JENSEN, KR;FERMIN, C
囊舌蛞蝓C.百合具有来自其藻类食物Avrainvillea nigricans的功能性共生叶绿体。饥饿65天后，共生质体继续固定C，但固定效率下降约85%。叶绿素水平在此期间没有下降。共生质体的退化主要表现为类囊体的肿胀和分层，质体电子密度增加，蛋白核电子密度降低。单个细胞内的质体几乎同时退化，表明单个细胞在短时间内吞噬了整个质体补体。温度强烈影响C固定，在净固定率和生产的醇不溶性光合产物。固定的最适温度为25 ℃。C.光合速率在约500 μ l时表现出饱和。- 是的（microeinsteins）. cntdot. m-2.cntdot. s-1，并且在低至25 μ s的强度下发生基本固定。- 是的. cntdot. m-2.cntdot. s-1条件下在完全阳光下（1500 μ l）没有发生抑制。- 是的. cntdot. m-2.cntdot. s-1）的情况。
The hermaeid ascoglossan slug C. lilianae possesses functional symbiotic chloroplasts derived from its algal food, Avrainvillea nigricans. Symbiotic plastids continued to fix C after 65 days starvation, although efficiency of fixation declined about 85%. Chlorophyll level did not decline during this period. Degeneration of symbiotic plastids involved swelling and delamination of thylakoids, increase in electron density of plastids and decrease in pyrenoid electron density. Plastids within single cells degenerate at about the same time, suggesting that individual cells phagocytize the entire complement of plastids during a brief period. Temperature strongly influenced C fixation, in rate of net fixation and in production of alcohol-insoluble photosynthates. The optimum temperature for fixation was 25.degree. C. Photosynthetic rate exhibited saturation at about 500 .mu..epsilon. (microeinsteins) .cntdot. m-2 .cntdot. s-1 and substantial fixation occurred at intensities as low as 25 .mu..epsilon. .cntdot. m-2 .cntdot. s-1. No inhibition occurred in full sunlight (1500 .mu..epsilon. .cntdot. m-2 .cntdot. s-1).