Although open-central canopy(OCC)is popular in apple(Malus×domestica)orchards in Loess Plateau of China,its relevant photosynthetic mechanisms have not been elucidated.In this study,changes in photosynthetically ...Although open-central canopy(OCC)is popular in apple(Malus×domestica)orchards in Loess Plateau of China,its relevant photosynthetic mechanisms have not been elucidated.In this study,changes in photosynthetically active radiation(PAR),gas exchange,chlorophyll fluorescence quenching and fruit quality in apple trees were measured in OCC and compared with those in the conventional condensed round and large canopy(RLC).Results showed that light intercepted at different orientations was 44%higher by OCC than that by RLC.The improved light environment within OCC remarkably increased leaf maximum net photosynthetic rate(Pnmax)and significantly decreased stomatal limitation.Under high light,the ratio of photorespiratory rate to gross photosynthetic rate(Pr/Pg)in OCC was higher than that in RLC.Moreover,reversible component in non-photochemical quenching(r(qE))was increased,while irreversible component(r(qI))was decreased in OCC than in RLC.As a result,the fruit quality in OCC was greatly boosted as evidenced by the significantly increased single fruit weight,fruit flesh firmness and fruit soluble solid contents and the sharply decreased fruit titratable acid contents.PAR intercepted by the canopy and the fruit soluble solid contents,leaf Pnmaxor single fruit weight were positively correlated,while PAR or Pnmaxwas negatively correlated with the fruit titratable acid contents.Accordingly,the improved crown light environment and the enhanced leaf photosynthetic performance and photoprotective capacity in OCC led to the boosted fruit quality.展开更多
目的比较在中央肝切除术中肝断面胶封法处理与肝断面敞开处理的临床效果,探讨肝断面胶封法处理的临床应用价值。方法回顾性分析2020年1月至2024年12月温州医科大学附属第一医院肝胆胰外科56例行中央肝切除术患者的临床资料,根据肝断面...目的比较在中央肝切除术中肝断面胶封法处理与肝断面敞开处理的临床效果,探讨肝断面胶封法处理的临床应用价值。方法回顾性分析2020年1月至2024年12月温州医科大学附属第一医院肝胆胰外科56例行中央肝切除术患者的临床资料,根据肝断面处理方式分为两组:肝断面胶封法处理组(n=15)和肝断面敞开处理组(n=41),比较两组患者的短期临床结局和相关临床指标差异。结果两组均无手术死亡病例,未发生肝衰竭等严重并发症。肝断面胶封法处理组出现胸腔积液2例,无胆漏、创面渗血、创面感染病例;肝断面敞开处理组发生胆漏1例,胸腔积液3例,创面渗血2例,无创面感染病例。两组术后并发症发生率比较,差异无统计学意义[13.33%(2/15)vs 14.63%(6/41),P=0.678]。两组手术时间、术中出血量、肝门阻断时间比较,差异均无统计学意义(P>0.05)。肝断面胶封法处理组术后第1天[(118.67±75.77)mL vs 150.00(120.00,210.00)mL,Z=-2.124,P=0.034]、第2天[(107.00±38.63)mL vs 150.00(100.00,220.00)mL,Z=-2.628,P=0.009]、第3天[(65.67±41.18)mL vs 130.00(80.00,220.00)mL,Z=-3.661,P<0.001]腹腔引流量均显著少于肝断面敞开处理组。两组术后第1、3、7天的丙氨酸氨基转移酶(ALT)、总胆红素(TBIL)和肌酐(Cr)比较,差异均无统计学意义(P>0.05)。两组共40例患者于术后1个月左右再入院接受肝癌术后预防性经动脉化疗栓塞(TACE)治疗,影像学检查见肝实质强化均匀,保留肝脏血管系统显示清晰,门静脉系统、肝静脉系统均未见狭窄。结论肝断面胶封法处理操作简便、安全可靠,可有效减少中央肝切除术后早期腹腔积液。肝断面胶封法处理为中央肝切除术中肝断面处理提供了一种新的可选择方案。展开更多
基金supported by Chinese National Key R&D Program(Grant No.2016YFD0201118)Shanxi Province Key R&D Program(Grant No.201903D211001-24-1)+2 种基金Agricultural Sci-Tech Innovation Project Program of Shanxi Academy of Agricultural Sciences(Grant No.YGC2019TD08-2)Agricultural Sci-Tech Innovation Research Program of Shanxi Academy of Agricultural Sciences(Grant Nos.YCX2020402,YCX2020302)Prior Support Program of Shanxi Academy of Agricultural Sciences(Grant No.YCX2018D2YS04)。
文摘Although open-central canopy(OCC)is popular in apple(Malus×domestica)orchards in Loess Plateau of China,its relevant photosynthetic mechanisms have not been elucidated.In this study,changes in photosynthetically active radiation(PAR),gas exchange,chlorophyll fluorescence quenching and fruit quality in apple trees were measured in OCC and compared with those in the conventional condensed round and large canopy(RLC).Results showed that light intercepted at different orientations was 44%higher by OCC than that by RLC.The improved light environment within OCC remarkably increased leaf maximum net photosynthetic rate(Pnmax)and significantly decreased stomatal limitation.Under high light,the ratio of photorespiratory rate to gross photosynthetic rate(Pr/Pg)in OCC was higher than that in RLC.Moreover,reversible component in non-photochemical quenching(r(qE))was increased,while irreversible component(r(qI))was decreased in OCC than in RLC.As a result,the fruit quality in OCC was greatly boosted as evidenced by the significantly increased single fruit weight,fruit flesh firmness and fruit soluble solid contents and the sharply decreased fruit titratable acid contents.PAR intercepted by the canopy and the fruit soluble solid contents,leaf Pnmaxor single fruit weight were positively correlated,while PAR or Pnmaxwas negatively correlated with the fruit titratable acid contents.Accordingly,the improved crown light environment and the enhanced leaf photosynthetic performance and photoprotective capacity in OCC led to the boosted fruit quality.
文摘目的比较在中央肝切除术中肝断面胶封法处理与肝断面敞开处理的临床效果,探讨肝断面胶封法处理的临床应用价值。方法回顾性分析2020年1月至2024年12月温州医科大学附属第一医院肝胆胰外科56例行中央肝切除术患者的临床资料,根据肝断面处理方式分为两组:肝断面胶封法处理组(n=15)和肝断面敞开处理组(n=41),比较两组患者的短期临床结局和相关临床指标差异。结果两组均无手术死亡病例,未发生肝衰竭等严重并发症。肝断面胶封法处理组出现胸腔积液2例,无胆漏、创面渗血、创面感染病例;肝断面敞开处理组发生胆漏1例,胸腔积液3例,创面渗血2例,无创面感染病例。两组术后并发症发生率比较,差异无统计学意义[13.33%(2/15)vs 14.63%(6/41),P=0.678]。两组手术时间、术中出血量、肝门阻断时间比较,差异均无统计学意义(P>0.05)。肝断面胶封法处理组术后第1天[(118.67±75.77)mL vs 150.00(120.00,210.00)mL,Z=-2.124,P=0.034]、第2天[(107.00±38.63)mL vs 150.00(100.00,220.00)mL,Z=-2.628,P=0.009]、第3天[(65.67±41.18)mL vs 130.00(80.00,220.00)mL,Z=-3.661,P<0.001]腹腔引流量均显著少于肝断面敞开处理组。两组术后第1、3、7天的丙氨酸氨基转移酶(ALT)、总胆红素(TBIL)和肌酐(Cr)比较,差异均无统计学意义(P>0.05)。两组共40例患者于术后1个月左右再入院接受肝癌术后预防性经动脉化疗栓塞(TACE)治疗,影像学检查见肝实质强化均匀,保留肝脏血管系统显示清晰,门静脉系统、肝静脉系统均未见狭窄。结论肝断面胶封法处理操作简便、安全可靠,可有效减少中央肝切除术后早期腹腔积液。肝断面胶封法处理为中央肝切除术中肝断面处理提供了一种新的可选择方案。
