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首页> 外文期刊>American Journal of Plant Sciences >Comparison of the S-, N- or P-Deprivations’ Impacts on Stomatal Conductance, Transpiration and Photosynthetic Rate of Young Maize Leaves
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Comparison of the S-, N- or P-Deprivations’ Impacts on Stomatal Conductance, Transpiration and Photosynthetic Rate of Young Maize Leaves

机译：S，N或P剥夺对年轻玉米叶片气孔导度，蒸腾作用和光合速率的影响比较

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Seven-day-old maize (Zea mays) plants were grown hydroponically for ten days in deprived nutrient solutions against the corresponding control grown under full nutrition; the effects of S-, N- or P-deprivation on laminas’ mean stomatal conductance (gs), transpiration rate (E) and photosynthetic rate (A) were monitored, along with the impact on the laminas’ total dry mass (DM), water amount (W), length and surface area (Sa). Furthermore, a time series analysis of each parameter’s response ratios (Rr), i.e. the treatment’s value divided by the corresponding control’s one, was performed. Under S-deprivation, the Rr of laminas’ mean gs, E, and A presented oscillations within a ±15% fluctuation zone, notably the “control” zone, whilst those of laminas’ total DM, water amount, surface area, and length included oscillation during the first days and deviation later on, presenting deviation during d10. Under the N-deprivation conditions all Rr time courses except the A one, included early deviations from the control zone without recovering. The deviation from the control zone appeared at d4. Under P-deprivation, all Rr time courses represented oscillations within the control zone. P-deprivation’s patterns resembled those of S-deprivation. Compared to the one of the S-deprivation, the P-one’s oscillations took place within a broader zone. Linear relationships among the various Rr patterns were found between gs-E, gs-A, E-A, DM-W and DM-Sa. In conclusion, the impact of P-deprivation appeared in an early stage and included an alleviation action, the one of N-deprivation appeared early with no alleviation action, whilst that of S-deprivation appeared later, being rather weaker when compared to the impact of the P-deprivation’s impact.
机译：将七天大的玉米（Zea mays）植物在缺乏营养液的情况下与全营养条件下生长的相应对照水培10天。监测了S，N或P剥夺对叶片平均气孔导度（gs），蒸腾速率（E）和光合速率（A）的影响，以及对叶片总干重（DM）的影响，水量（W），长度和表面积（Sa）。此外，还对每个参数的响应率（Rr）进行了时间序列分析，即治疗值除以相应对照组的响应率。在S剥夺下，薄片的平均gs，E和A的Rr在±15％的波动区域内出现振荡，尤其是“控制”区域，而薄片的总DM，水量，表面积和长度包括前几天的振荡和随后的偏差，在d10期间出现偏差。在N剥夺条件下，除A以外的所有Rr时程都包括与控制区的早期偏差而没有恢复。与对照区的偏差出现在d4。在P剥夺下，所有Rr时间进程都表示控制区内的振荡。 P剥夺的模式类似于S剥夺的模式。与S剥夺相比，P-one的波动范围更大。在gs-E，gs-A，E-A，DM-W和DM-Sa之间发现了各种Rr模式之间的线性关系。总之，P剥夺的影响出现在早期，并且包括缓解作用; N剥夺的影响出现较早，没有缓解作用;而S剥夺的影响出现较晚，与影响相比，它的影响较弱。 P剥夺的影响。

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