| 胡文海,齐超,胡雪华,闫小红,李晓红.恢复期不同光强对低夜温后番茄叶片快速叶绿素荧光诱导动力学特征的影响[J].井冈山大学自然版,2022,43(2):41-47,66 |
| 恢复期不同光强对低夜温后番茄叶片快速叶绿素荧光诱导动力学特征的影响 |
| EFFECTS OF DIFFERENT LIGHT INTENSITIES ON CHLOROPHYLL FLUORESCENCE TRANSIENT IN LEAVES OF TOMATO DURING RECOVERY PERIOD AFTER LOW NIGHT TEMPERATURE |
| 投稿时间：2021-10-16 修订日期：2021-11-20 |
| DOI：10.3969/j.issn.1674-8085.2022.02.007 |
| 中文关键词: 番茄 低夜温 光强 恢复期 快速叶绿素荧光诱导动力学曲线 |
| 英文关键词: Solanum lycopersicum L. low light temperature light intensity recovery period chlorophyll fluorescence transient |
| 基金项目:江西省自然科学基金重点项目(20192ACB20017) |
| 作者 | 单位 | | 胡文海 | 井冈山大学生命科学学院, 江西, 吉安 343009
江西省红壤丘陵区农业环境污染防控重点实验室, 江西, 吉安 343009 | | 齐超 | 井冈山大学生命科学学院, 江西, 吉安 343009 | | 胡雪华 | 井冈山大学生命科学学院, 江西, 吉安 343009
江西省红壤丘陵区农业环境污染防控重点实验室, 江西, 吉安 343009 | | 闫小红 | 井冈山大学生命科学学院, 江西, 吉安 343009
江西省红壤丘陵区农业环境污染防控重点实验室, 江西, 吉安 343009 | | 李晓红 | 井冈山大学生命科学学院, 江西, 吉安 343009
江西省红壤丘陵区农业环境污染防控重点实验室, 江西, 吉安 343009 |
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| 中文摘要: |
| 为探讨低夜温后不同光强恢复对番茄叶片光合机构的影响,以番茄品种"中蔬4号"为材料,幼苗在5℃低夜温处理12 h后,移入人工气候室(18-28℃)弱光(约100 μmol·m-2·s-1)或强光(约1200 μmol·m-2·s-1)下恢复8 h,观测叶片快速叶绿素荧光诱导动力学曲线在低夜温及恢复期的变化。结果表明,低夜温虽然未导致光抑制的发生,但降低了番茄叶片的光合性能。低夜温未影响单位叶面积对光能的吸收(ABS/CS)与捕获(TRo/CS),但降低了用于电子传递的光能(ETo/CS),同时也诱导了热耗散(DIo/CS)的增加。低夜温未对PSII供体侧放氧复合体(OEC)产生影响,但阻碍了PSII受体侧QA向QB的电子传递。恢复期强光加剧了番茄叶片光合性能的下降,并导致光抑制的发生。恢复期强光还显著降低了ABS/CS、TRo/CS和ETo/CS,促进了DIo/CS的增加,但随着强光胁迫时间延长热耗散的保护作用有所下降。恢复期强光造成OEC的伤害,严重阻碍了光合电子传递的进行,且对PSII的破坏程度大于PSI。可见,恢复期弱光处理有利于叶片光合性能的增强和光合电子传递的恢复。 |
| 英文摘要: |
| In order to investigate the effects of different light intensities on the functional activities of the photosynthetic apparatus of tomato during recovery period after low night temperature,tomato (Zhongshu No.4) was used for this experiment.Tomato seedlings were cultured in artificial climate chamber at temperature range approximately 18-28℃,photosynthetic photo flux density (PPFD) approximately 600 μmol.m-2.s-1,12-h photoperiod.The seedlings were transferred to artificial climate box (ZRY-YY1000,Ningbo) at 5℃ low night temperature (LNT) for overnight (19:00-7:00) exposure in the dark.On the following morning,the seedlings were transferred to the artificial climate chamber and exposed to low light (LL,approximately 100 μmol.m-2.s-1) or highlight (HL,approximately 1200 μmol.m-2.s-1).Throughout the experiment,chlorophyll fluorescence transient was examined in the youngest developmental leaf under low night temperature and subsequent recovery periods.The results showed that LNT reduced the photosynthetic performance of PSII in tomato leaves,but not inducedphotoinhibition.LNT also did not affect the specific energy fluxes per unit area for absorption (ABS/CS) and trapping (TRo/CS),however,decreased electron transport (ETo/CS) and increased dissipation energy fluxes per unit area (DIo/CS).LNT did not disrupted the oxygen-evolving complex (OEC),but blocked the electron transfer from QA to QB.During the recovery period,high light aggravated the decline of photosynthetic performance and led to the occurrence of photoinhibition.High light also decreased the ABS/CS,TRo/CS and ETo/CS.High light induced the increase of DIo/CS,however,the protective capability of energy dissipation was reduced to some extent with the time.High light not only disrupted the OEC,but also seriously blocked the photosynthetic electron transfer,and the damage to electron transfer of PSII was greater than that of PSI.Low light was beneficial to the recovery of photosynthetic performance and electron transfer of tomato leaves during the recovery period after LNT. |
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