摘要
为了探究空心莲子草对阳生和阴生环境的适应性,对两种光环境下空心莲子草叶片快速叶绿素荧光诱导动力学进行了分析。结果表明,两种光环境下的空心莲子草叶片快速叶绿素荧光诱导动力学曲线(OJIP曲线)存在明显差异,但其PIABS却无差异。阳生环境下的空心莲子草具有相对较高的Sm、ψo、φDo、φRo、ETo/RC、DIo/RC和REo/RC。而阴生环境下的空心莲子草则具有相较高的TRo/RC、RC/CS、ABS/CS和TRo/CS。这表明,阳生环境下的空心莲子草可通过增大PQ库容量和PSI活性来提高光合电子传递链的电子传递效率,并增强热耗散能力以消耗过量吸收光能,从而防御了强光对光合机构的伤害;而阴生环境下,空心莲子草可通过增加单位面积中反应中心数量来增强对弱光的吸收与利用能力。
In order to explore the adaptability of Alternanthera philoxeroides to the shading and sun environment,the chlorophyll fluorescence transient in leaves of A.philoxeroides under shading and sun environment was studied.The results showed that there was significant difference in OJIP curve between the leaves of A.philoxieroides under the two light condition,however,there was no difference in PIABS.Under sun environment,A.philoxieroides possessed higher Sm,ψo,φDo,φRo,ETo/RC,DIo/RC and REo/RC.However,there were higher TRo/RC、RC/CS、ABS/CS和TRo/CS in the leaves of A.philoxieroides under shading environment.These results indicated that A.philoxieroides under sun environment can improve the electron transfer efficiency by increasing the PQ pool capacity and PSI activity,and consume excessive light energy by enhancing the heat dissipation ability,which can prevent the damage of high light to photosynthetic apparatus.Under shading environment,A.philoxieroides can increase the number of reaction centers per unit leaf area to enhancing the capacity of absorption and utilization of low light.
作者
胡文海
李海超
周兵
HU Wen-Hai;LI Hai-Cao;ZHOU Bing(School of Life Sciences,Jinggangshan University,Ji’an,Jiangxi 343009,China;Key Laboratory for Biodiversity Science and Ecological Engineering,Ji’an,Jiangxi 343009,China)
出处
《井冈山大学学报（自然科学版）》
2020年第4期38-42,共5页
Journal of Jinggangshan University (Natural Science)
基金
江西省高等学校科技落地计划项目(KJLD12079)。
