CAJ | 학술논문

通过设置对照(CK)、持续性水淹(CF)、间歇性水淹(PF)和全淹(FF)4个水淹处理，模拟三峡库区秋冬季消落带土壤水淹变化，研究2年生中华蚊母树的生理生态适应机制。结果表明：不同水淹形式并没有显著影响中华蚊母树的株高和基径，而光合色素含量、光合及叶绿素荧光特性在不同水淹形式下却有所差异，CF 和 PF 植株光合色素含量、净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)、最大光化学效率(Fv/Fm)、光化学猝灭(qP)以及电子传递速率( ETR)均出现了显著下降，但 PF植株下降的幅度要小于 CF植株，除光合色素含量、Gs和 Tr外，其他指标均差异显著，而 FF植株光合色素含量、Pn、Gs、Tr、Fv/Fm、qP 以及 ETR均未受到水淹的影响，与 CK植株差异不显著； CF和 PF植株叶片非光化学淬灭( qN )未受到水淹的影响，但 FF植株叶片 qN 与 CK相比却显著下降。虽然 CF植株较其他处理植株叶绿素含量、Pn、Gs、Tr、Fv/Fm、qP 以及 ETR 均下降明显，但水淹处理植株能够通过形成不定根、特化的皮孔以及减少叶片数量来增加耐淹能力。因此，中华蚊母树具有较强的耐淹能力，在不同水淹形式下均表现出一定的适应性和可塑性。
통과설치대조(CK)、지속성수엄(CF)、간헐성수엄(PF)화전엄(FF)4개수엄처리，모의삼협고구추동계소락대토양수엄변화，연구2년생중화문모수적생리생태괄응궤제。결과표명：불동수엄형식병몰유현저영향중화문모수적주고화기경，이광합색소함량、광합급협록소형광특성재불동수엄형식하각유소차이，CF 화 PF 식주광합색소함량、정광합속솔(Pn)、기공도도(Gs)、증등속솔(Tr)、최대광화학효솔(Fv/Fm)、광화학졸멸(qP)이급전자전체속솔( ETR)균출현료현저하강，단 PF식주하강적폭도요소우 CF식주，제광합색소함량、Gs화 Tr외，기타지표균차이현저，이 FF식주광합색소함량、Pn、Gs、Tr、Fv/Fm、qP 이급 ETR균미수도수엄적영향，여 CK식주차이불현저； CF화 PF식주협편비광화학쉬멸( qN )미수도수엄적영향，단 FF식주협편 qN 여 CK상비각현저하강。수연 CF식주교기타처리식주협록소함량、Pn、Gs、Tr、Fv/Fm、qP 이급 ETR 균하강명현，단수엄처리식주능구통과형성불정근、특화적피공이급감소협편수량래증가내엄능력。인차，중화문모수구유교강적내엄능력，재불동수엄형식하균표현출일정적괄응성화가소성。
Four flooding treatments ( control,CK; continuous flooding,CF; periodic flooding,PF; and Full flooding, FF) were set in simulating the soil flooding change of the riparian zone in the Three Gorges Reservoir region of China to study the physiological and ecological adaptation mechanisms of two-year-old perennial Distylium chinense seedlings to the soil flooding change. There were no significant differences in height and basal diameter of the seedlings grown under different water regimes,while the content of chlorophyll,photosynthesis and fluorescence characteristics under different flooding forms were significantly different. Chlorophyll content,net photosynthetic rate(Pn),stomatal conductance(Gs), transpiration rate(Tr),maximal photochemical efficiency (Fv/Fm),photochemical quenching (qP) and electron transfer rate ( ETR) in CF and PF decreased significantly,and the decrease in PF was smaller than CF. In addition to chlorophyll content,Gs and Tr,the other indicators were significantly different; Chlorophyll content,Pn,Gs,Tr,Fv/Fm,qP and ETR in FF were not significantly different compared with CK;Non-photochemical quenching ( qN ) in CF and PF was not significantly different from CK,while the qN in FF was decreased significantly. Although the chlorophyll content,Pn,Gs, Tr,Fv/Fm,qP and ETR in CF decreased significantly compared with the other treatments,the plants were able to form adventitious roots,hypertrophic lenticels and reduce the leaf increment to enhance resilience to flooding. Thus,D. chinense has strong tolerant capabilities to submergence,and shows a certain adaptability and plasticity in different flooding forms.