Impedance analysis of Labisia pumila plant water status

作     者：Diyana Jamaludin Samsuzana Abd Aziz Desa Ahmad Hawa Z.E.Jaafar 

作者机构：Department of Biological and Agricultural EngineeringFaculty of EngineeringUniversiti Putra Malaysia43400 UPM SerdangSelangorMalaysia Department of Crop ScienceFaculty of AgricultureUniversiti Putra Malaysia43400 UPM SerdangSelangorMalaysia 

出 版 物：《Information Processing in Agriculture》 (农业信息处理（英文）)

年 卷 期：2015年第2卷第3期

页      面：161-168页

核心收录：

学科分类：0907[农学-林学] 0908[农学-水产] 0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 1002[医学-临床医学] 0707[理学-海洋科学] 0905[农学-畜牧学] 0906[农学-兽医学] 0829[工学-林业工程] 100201[医学-内科学(含：心血管病、血液病、呼吸系病、消化系病、内分泌与代谢病、肾病、风湿病、传染病)] 0901[农学-作物学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 10[医学] 

基　　金：The authors gratefully acknowledge the financial support from the Ministry of Education Malaysia and Universiti Putra Malaysia with the UPM Research Grant Scheme(Project Code:GP-IPS/2013/9399814) The authors would also like to acknowledge Mrs.Nadirah Roslan who was involved in data collection process 

主　　题：Impedance spectroscopy Plant water status Labisia pumila Impedance Reactance Resistance 

摘      要：Labisia pumila(Kacip fatimah)is a popular medicinal plant in *** constituents of this plant have been reported to possess anticancer,antioxidant and anti-inflammatory *** growth and production of *** is greatly influenced by the plant water *** techniques to measure plant water status are generally based on the plant soil moisture,which apparently did not indicate the real water content inside the *** are other techniques to measure directly on the plant such as based on leaf water potential(LWP)and relative water content(RWC).However,these techniques are destructive and time *** this study,four levels of evapotranspiration replacement(ER)treatment which were 100%ER,75%ER,50%ER and 25%ER was applied to 30 polybags of *** *** plant water status was measured using an impedance spectroscopy technique.A pair of electrocardiogram(ECG)electrode connected to an impedance analyzer board was used to measure the impedance value of the leaf samples *** water status parameters such as LWP,RWC,volumetric moisture content(VMC),and leaf thickness were measured using standard *** results show that after 20 weeks of treatment,25%ER had the highest impedance value ranged from 0.10 MX to 0.15 MX at the frequency of 70–100 *** resistance of 100%ER at 20 weeks of treatment increased from 0.70 kX to 1.23 kX as the reactance decreased from 0.51 kX to 0.28 ***,the resistance of 25%ER increased from 1 kX to 1.10 kX as the reactance decreased from 0.88 kX to 0.83 *** polynomial regression of impedance measurements with plant water status parameters(VMC,leaf thickness,LWP and RWC)shows that LWP and RWC had the highest R2(0.78,0.73).The results show that impedance measurement technique is auspicious to evaluate plant water status.