|Table of Contents|

Reduction of Extreme Drought and Its Stress Duration on the Photosynthetic Efficiency of Forsythia suspensa

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2026年4
Page:
51-60
Research Field:
Publishing date:

Info

Title:
Reduction of Extreme Drought and Its Stress Duration on the Photosynthetic Efficiency of Forsythia suspensa
Author(s):
DONG Fangyu1; LANG Ying1; XU Yanhui2; YANG Xiuyi1
(1.College of Agriculture and Forestry Sciences，Linyi University,Linyi,Shandong 276000;2.Hydrological Bureau of Weihai City，Shandong Province，Weihai，Shandong 264200)
Keywords:
extreme drought; stress duration; photosynthetic efficiency; chlorophyll fluorescence; non-stomatal restriction
PACS:
R284.1
DOI:
10.11937/bfyy.20252357
Abstract:
Taking Forsythia suspensa as the test material，pot simulation experiments were carried out.Different extreme soil drought treatments were obtained by combining artificial irrigation，natural water consumption of plants and weighing，and the photosynthesis and chlorophyll fluorescence in leaves of Forsythia suspensa were measured.The process and mechanism of the reduction of photosynthetic efficiency in Forsythia suspensa were studied,in order to provide reference for water management of mountain plants under extreme drought.The results showed that,1) when the relative soil water content (RSWC) decreased to 46.17%，the main reason for the decrease of net photosynthetic rate (Pn) was non-stomatal confinement，and the Pn and water use efficiency (WUE) were significantly lower than the average in the range of RSWC46.17%，which was defined as the extreme drought range of Forsythia suspensa.2) Under extreme drought (RSWC46.17%)，with the decrease of RSWC，Pn，WUE，maximum photochemical efficiency and actual photochemical efficiency of PSⅡ (Fv/Fm，ΦPSⅡ)，photochemical quenching coefficient (qP) and maximum fluorescence (Fm) decreased significantly，and the initial fluorescence (Fo) increased significantly，indicating that the water deficit in extreme drought caused damage to the reaction center of PSⅡ，inhibited the photosynthetic electron transfer rate，and induced photoinhibition.In turn，the photosynthetic efficiency of forsythia was reduced.3) Pn，WUE，Fv/Fm and ΦPSⅡ decreased to 0 values during the 28 days period of extreme drought water threshold (RSWC of stomatal mechanism turning，RSWC of leaf wilting，and RSWC of Pn approach to 0)，and then fluctuated at 0 values.In the early stage of stress (less than 7 days)，the photosynthetic efficiency (Pn，WUE，Fv/Fm，ΦPSⅡ) of Forsythia suspensa was higher than 0 by increasing NPQ and decreasing qP.However，with the continuous prolongation of stress (14-28 days)，the photosynthetic efficiency (Pn，WUE，Fv/Fm，ΦPSⅡ) fluctuated at 0，and qP and NPQ tended to be 0，and the Forsythia suspensa photosynthetic system was seriously damaged and the self-regulation mechanism was on the verge of collapse.

References:

［1］张婧雯，郭太君，刘瑞文，等．树冠不同部位叶片结构与固碳释氧和增湿降温相关性［J］．北方园艺，2018(1)：98-103．［2］韩梦梦，罗炘武，粟春青，等.生物结皮对土壤养分及碳循环影响的研究进展［J］.北方园艺，2023(24)：132-137．［3］慕德宇，杨宁.五个地被菊品系对干旱胁迫的生理响应［J］.北方园艺，2025(19)：45-50.［4］陈永君，毛欣欣，吕泽良，等.北苍术与关苍术干旱生理变化及耐旱性比较［J］.北方园艺，2025(21)：62-71.［5］杨小英，黄艳竹，郝春磊，等.干旱胁迫对彩菊切花幼苗根系构型和生理活性的影响［J］.北方园艺，2024(2)：47-54.［6］KLEM K，MISHRA K B，NOVOTN K I，et al.Distinct growth and physiological responses of Arabidopsis thaliana natural accessions to drought stress and their detection using spectral reflectance and thermal imaging［J］.Functional Plant Biology，2017，44(3)：312-323．［7］ZHAO Y，XIONG L，YIN J，et al.Understanding the effects of flash drought on vegetation photosynthesis and potential drivers over China［J］.Science of the Total Environment，2024，931：172926.［8］FENG X，LIU R，LI C，et al.Contrasting responses of two C4 desert shrubs to drought but consistent decoupling of photosynthesis and stomatal conductance at high temperature［J］.Environmental and Experimental Botany，2023，209：105295.［9］HAMI M.Photosynthesis of C3 and C4 species in response to increased CO2 concentration and drought stress［J］.HAYATI Journal of Biosciences，2005，12(4)：131.［10］LEHR P P，ERBAN A，HARTWIG R P，et al.Grapevine and maize：Two guard cell shaped strategies to cope with repeated drought stress［J］．Plant Physiology and Biochemistry，2024，217：109262．［11］杨勇，闫俊峰，杨伟民，等.羽衣甘蓝〖STBX〗BoNAC02〖STBZ〗基因参与脱落酸和干旱胁迫响应的功能研究［J］.北方园艺，2025(23)：1-10.［12］GONG X W，HAO G Y.The synergistic effect of hydraulic and thermal impairments accounts for the severe crown damage in Fraxinus mandshurica seedlings following the combined drought-heatwave stress［J］.The Science of the Total Environment，2023，856：159017.［13］BEIS A，PATAKAS A.Relative contribution of photoprotection and anti-oxidative mechanisms to differential drought adaptation ability in grapevines［J］.Environmental and Experimental Botany，2012，78：173-183.［14］ROH〖AKCˇ〗EK K，Chlorophyll fluorescence parameters：The definitions，photosynthetic meaningm and mutual relationships［J］.Photosynthetica，2002，40(1)：13-29.［15］LANG Y，WANG M，ZHANG G C，et al.Experimental and simulated light responses of photosynthesis in leaves of three tree species under different soil water conditions［J］.Photosynthetica，2013，51(3)：370-378.［16］夏江宝，张淑勇，张光灿，等.土壤水分对金银花叶片气体交换参数及水分利用效率的影响［J］.林业科学研究，2008，21(6)：803-807.［17］郎莹，汪明.春、夏季土壤水分对连翘光合作用的影响［J］.生态学报，2015，35(9)：3043-3051.［18］李诗莹，赵乾坤，郎莹，等.沂蒙山区金银花光合效率对土壤水分的响应［J］.西北林学院学报，2020，35(3)：55-60．［19］张旭丽，王瑞军，郗小倩，等.干旱胁迫及复水对黄芪幼苗生长、生理特性及次生代谢产物积累的影响［J］.作物杂志，2024(5)：204-211.［20］景雄，范少辉，蔡春菊，等.基于光合特性的毛竹实生苗土壤水分有效性及生产力分级［J］.生态学杂志，2021，40(10)：3088-3097.［21］齐曼·尤努斯，木合塔尔·扎热，塔衣尔·艾合买提.干旱胁迫下尖果沙枣幼苗的根系活力和光合特性［J］.应用生态学报，2011，22(7)：1789-1795.［22］赵安周，韩晓冉，刘宪锋，等.基于干旱荧光监测指数的海河流域干旱监测研究［J］.农业机械学报，2025，56(3)：458-466.［23］BASTOS A，CIAIS P，FRIEDLINGSTEIN P，et al.Direct and seasonal legacy effects of the 2018 heat wave and drought on European ecosystem productivity［J］.Science Advances，2020，6(24)：2724.［24］王琰，陈建文，狄晓艳.不同油松种源光合和荧光参数对水分胁迫的响应特征［J］.生态学报，2011，31(23)：46-53.［25］FELLER U.Drought stress and carbon assimilation in a warming climate：Reversible and irreversible impacts［J］.Journal of Plant Physiology，2016，203：84-94.［26］阎腾飞，黄玉杰，李文杨，等.干旱胁迫条件下信阳五月鲜桃光合特性和生理生化指标变化规律研究［J］.节水灌溉，2019(1)：45-48，56.［27］王继玥，刘政宏，石登红，等.黄秋葵响应干旱胁迫研究进展［J］.北方园艺，2021(22)：135-141.［28］柴成武，王方琳，赵鹏，等.干旱胁迫对沙蒿叶片水分含量、光合特性及抗氧化酶的影响［J］.西北林学院学报，2025，40(1)：42-50.［29］艾力江·麦麦提，祖丽皮耶·托合提麦麦提，蒋艳，等.黑果腺肋花楸苗木对土壤干旱的光合及生理响应［J］.经济林研究，2024，42(2)：131-144．［30］马佳，彭杰丽，贾楠，等.低温胁迫下链霉菌TOR3209对番茄叶绿素荧光特性和叶黄素循环的影响［J］.中国农业科学，2024，57(22)：4522-4540.［31］柴胜丰，唐健民，王满莲，等.干旱胁迫对金花茶幼苗光合生理特性的影响［J］.西北植物学报，2015，35(2)：322-328.［32］杨锐，郎莹，张光灿，等.野生酸枣光合及叶绿素荧光参数对土壤干旱胁迫的响应［J］．西北植物学报，2018，38(5)：922-931.［33］邓平，吴敏，林丁，等.干旱-复水对桂西北喀斯特地区青冈栎幼苗叶片光合能力、叶绿素荧光和显微结构的影响［J］．西北植物学报，2024，44(1)：63-76.［34］张雯，臧永新，徐文轩，等.7年极端干旱对准噶尔假木贼群落叶片非结构性碳水化合物的影响［J］.生态学报，2025，45(15)：7470-7481.［35］邵畅畅，段洪浪，赵熙州，等.树木干旱死亡点预测及致死生理机制研究进展［J］.植物生态学报，2025，49(2)：221-231．

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Last Update: 2026-03-12