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本文研究了外源6-BA对低温胁迫下茄子幼苗光合作用、叶绿素荧光参数和能量分配的影响。结果表明,外源6-BA显著增加了低温胁迫下茄子叶绿素含量、净光合速率(P n)、蒸腾速率(T r)、气孔导度(G s)和胞间CO2浓度(C i);同时外源6-BA明显提高了低温胁迫下茄子幼苗叶片的PSII最大光化学效率(F v/F m)、PSII潜在活性(F v/F o)、PSII天线转化效率(F v′F m′)、实际光化学效率(ΦPSII)、光化学猝灭系数(q P)和光化学反应能量(P),降低了非光化学猝灭系数(NPQ)、天线热耗散能量(D),对非光化学反应耗散能量(E)无明显影响。表明外源6-BA处理通过促进低温胁迫下茄子幼苗光合作用,提高光合电子传递效率,从而保护光合系统,降低低温胁迫对植物的损伤。
In this paper, the effects of exogenous 6-BA on photosynthesis, chlorophyll fluorescence parameters and energy allocation of eggplant seedlings under chilling stress were studied. The results showed that exogenous 6-BA significantly increased the chlorophyll content, net photosynthetic rate (P n), transpiration rate (T r), stomatal conductance (G s) and intercellular CO2 concentration (C i) of eggplant under low temperature stress; At the same time, exogenous 6-BA significantly increased PSII maximum photochemical efficiency (F v / F m), PSII potential activity (F v / F o), PSII antenna conversion efficiency (F v ’F m’ ), Actual photochemical efficiency (ΦPSII), photochemical quenching coefficient (qP) and photochemical reaction energy (P), and the decrease of NPQ, antenna heat dissipation energy (D) Scattered energy (E) had no significant effect. The results showed that exogenous 6-BA could protect the photosynthetic system and reduce the damage of plants under low temperature stress by promoting the photosynthesis of eggplant seedlings under low temperature stress and increasing the photosynthetic electron transfer efficiency.