浙江农业科学 ›› 2026, Vol. 67 ›› Issue (7): 1725-1733.DOI: 10.16178/j.issn.0528-9017.20240944

• 观赏园艺 • 上一篇    下一篇

基于叶绿素荧光参数的百合干旱胁迫诊断

蒋沅均1(), 杨一平2, 付曼曼3, 吴超3()   

  1. 1.三峡大学,湖北 宜昌 443000
    2.海宁市经济作物技术服务站,浙江 海宁 314499
    3.浙江省农业科学院 园艺研究所,浙江 杭州 310021
  • 收稿日期:2024-12-11 出版日期:2026-07-11 发布日期:2026-07-27
  • 通讯作者: 吴超
  • 作者简介:吴超,E-mail:semporna@126.com
    蒋沅均,研究方向为花卉及食药用植物。E-mail:18274582247@163.com
  • 基金资助:
    浙江省农业重大技术协同推广计划(2023ZDXT11-2)

Diagnosis of drought stress in lilies based on chlorophyll fluorescence parameters

JIANG Yuanjun1(), YANG Yiping2, FU Manman3, WU Chao3()   

  1. 1.China Three Gorges University,Yichang 443000,Hubei
    2.Haining Economic Crop Technology Service Station,Haining 314499,Zhejiang
    3.Institute of Horticulture,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,Zhejiang
  • Received:2024-12-11 Online:2026-07-11 Published:2026-07-27
  • Contact: WU Chao

摘要:

水分和光合作用是影响植物生长的关键因素,干旱胁迫会导致叶片气孔关闭,影响植物的光合作用。为了明确百合“Sunderland”在干旱胁迫下的叶绿素荧光参数变化,研究分析了不同光合有效辐射与温度条件下的叶绿素荧光参数,校订了光合速率与叶绿素荧光参数之间的函数关系。同时利用干旱胁迫处理期间和解除干旱胁迫后的数据,分析复水前后的叶绿素荧光参数的变化。结果显示,随着光合有效辐射的增加,叶绿体光合系统Ⅱ(PSⅡ)实际光化学量子效率(Φ2)呈现下降趋势,可调性能量耗散量子产量(ΦNPQ)呈现上升趋势。非调节性能量耗散量子产量(ΦNO)在不同温度下基本保持不变,与ΦNPQ呈现负相关。当光合有效辐射为0时,百合具有最大的Φ2Φ2预测值和实测值之间的决定系数(R2)为0.95,精准度(rRMSE)为3.15%。PSⅡ反应中心开放比率(qL)预测值和实测值之间的(R2)为0.86,rRMSE为6.15%。ΦNPQ预测值和实测值之间的R2为0.95,rRMSE为9.58%。随着干旱胁迫程度的增加,ΦNOΦNPQ增加,饱和光强下的叶片净光合速率(Pn,max)、Φ2、qL以及光系统Ⅱ最大光化学量子效率(Fv/Fm)值减少,单位电子的碳同化能力和暗呼吸速率(Rd)均有所降低。复水处理10 d后,-20~-15 kPa水势时,百合的Pn,maxΦ2与-10~-4 kPa时的基本一致。研究结果为百合在干旱胁迫下的生长评估提供了一定的参考。

关键词: 百合, 干旱胁迫, 叶绿素荧光参数, 诊断, 水势

Abstract:

Water and photosynthesis are key factors regulating plant growth,and drought stress induces stomatal closure in leaves,thereby impairing plant photosynthetic performance. To clarify the changes in chlorophyll fluorescence parameters of lily ‘Sunderland’ under drought stress,this study analyzed chlorophyll fluorescence parameters under varying photosynthetically active radiations and temperatures,and calibrated the functional relationship between photosynthetic rate and chlorophyll fluorescence parameters. Additionally,data collected during drought stress and after stress relief were used to examine changes in chlorophyll fluorescence parameters before and after rewatering. The results showed that with an increase in photosynthetically active radiation,the quantum yield of chloroplast photosystem Ⅱ(PSⅡ) photochemistry(Φ2)exhibited a decreasing trend,while the quantum yield of regulated energy dissipation(ΦNPQ)showed an increasing trend. The quantum yield of non-regulated energy dissipation(ΦNO)remained essentially unchanged across different temperatures and was negatively correlated with ΦNPQ. Lily plants achieved the maximum Φ? when photosynthetically active radiation was 0. The coefficient of determination (R2) between predicted and actual values of Φ? was 0.95,with a relative root mean square error(rRMSE)of 3.15%. For the fraction of open PSII reaction centers(qL),the R2 was 0.86 and the rRMSE was 6.15%. For ΦNPQ,the R2 was 0.95 and the rRMSE was 9.58%. With increasing drought stress intensity,ΦNO and ΦNPQ increased,while the net photosynthetic rate at saturating light(Pn,max),Φ2,qL,and the maximum photochemical efficiency of PSII(Fv/Fm)decreased. Furthermore,the carbon assimilation capacity per electron(s)and dark respiration rate(Rd)were also reduced. After 10 days of rewatering,Pn,max and Φ? of lily plants under a soil water potential of -20 to -15 kPa were essentially consistent with those under -10 to -4 kPa. These findings provide a reference for evaluating the growth of lily under drought stress.

Key words: lily, drought stress, chlorophyll fluorescence parameter, diagnosis, water potential

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