Navicula grimmei and Nitzschia palea occurring almost equally in a mixed population on department moist garden soil surface when maintained in fresh supernatant (of soil-water medium) at pH 7.0, temperature of 26 +/- 1 degree C and under continuous light (intensity of approximately equal to 30 micromol m(-2) s(-1)) in a culture chamber exhibited a similar cell survival period (of 28 d) and percentage (at the beginning 100 % and mid of survival period 65 %) and stop gliding 11 d prior to cell death (with gliding speed reduced in both from 204-330 microm/min at the beginning to 82.5-99 microm/min at the mid of gliding period) irrespective of their size differences. However, a sharp fall in the cell gliding period, gliding cell percentage and speed occurred at various levels (different from cell survival period and percentage) in both diatoms in a similar extent under water stress (2, 4 and 6 % agarized supernatant, liquid supernatant with 0.2-1.0 mol/L NaCl, blot-dryness of cells for 5-15 min), pH extreme of liquid supernatant (< or =5.0, > or =9.0), temperature extremes in liquid supernatant (< or =15, > or =40 degrees C), UV exposure (0.96-5.76 kJ/m2), lack of all nutrients from the medium (double distilled water), darkness or low light intensities (2 and 10 micromol m(-2) s(-1)), presence of 'heavy' metals (Ni, Cu, Zn, Co, Fe, Hg; 1-200 ppm), organic substances in liquid supernatant (DDT, captan, urea, 2,4-D, 100-2000 ppm; thiourea, 50-1000 ppm). N. palea sway (turn around at either ends) or not only when gliding but independent of cell gliding speed, which decreased continuously under all conditions.

译文

:保持在pH 7.0的新鲜上清液(土壤-水介质)中,温度为26 /-1摄氏度,并在连续光照下(强度为25°C),在部门潮湿的花园土壤表面上的混合种群中,细叶小夜蛾和小白僵菌几乎均等地发生在部门潮湿的花园土壤表面上在培养室中大约等于30 micromol m(-2)s(-1))表现出相似的细胞存活期(28 d)和百分比(在存活期的开始100%和中期65%)并停止滑动细胞死亡前11天(滑行速度从开始时的204-330 microm / min降低到滑行中段的82.5-99 microm / min),无论它们的大小差异如何。然而,在水分胁迫下,两种硅藻的细胞滑行期,细胞滑行百分比和速度均在不同水平(不同于细胞存活期和百分比)急剧下降(2%,4%和6%的琼脂上清液,含0.2-1.0 mol / L NaCl的上清液,细胞印迹干燥5-15分钟),液体上清液的pH极限值(<或= 5.0,>或= 9.0),液体上清液的温度极限值(<或= 15, >或= 40摄氏度),紫外线暴露(0.96-5.76 kJ / m2),缺少培养基中的所有养分(双蒸馏水),黑暗或弱光强度(2和10 micromol m(-2)s(- 1)),液体上清液中存在的``重''金属(镍,铜,锌,钴,铁,汞; 1-200 ppm),有机物(滴滴涕,硫丹,尿素,2,4-滴,100-2000) ppm;硫脲,50-1000 ppm)。帕氏猪笼草摇晃(在两端转动),或者不仅在滑行时摇摆,而且与细胞滑行速度无关,后者在所有情况下都持续下降。

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