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While studied as a PhD student (1987-1990) and worked as a postdoctoral fellow (1990-1991) in Australia, Dr. He Jie had been actively involved in the research on environmental stresses (light, UV-B radiation and temperature) on photosynthesis including the properties of chloroplast and its functions, light capture, electron and ion transport, chlorophyll fluorescence and Rubisco protein. Dr. He Jie worked as a Research Fellow in the Department of Botany, National University of Singapore from January 1992 to November 1994 on a project entitled "Studies on photosynthetic characteristics, photosynthetic acclimation and photoinhibition in tropical plants". Dr. He Jie is currently an Associate Professor. Her research team has been involved in studying the physiological changes of high value vegetables by cooling the root-zone (RZ) while their aerial portions are subjected to fluctuating hot ambient temperature since she joined NIE in November 1994. Dr He Jie and her team members were also involved in studying the physiology of high value vegetables by enriching RZ CO2 while their aerial portions were subjected to constant atmospheric CO2. Performance of crops with rhizosphere manipulation was monitored using chlorophyll fluorescence and photosynthetic CO2 assimilation. The research team focused on nutrient uptake, N and C metabolism. Measuring total nitrate and organic N of plant tissues, assay of an important enzyme such as nitrate reductase had also been undertaken. C metabolism was studied by feeding 14CO2 and analyzing carbohydrates as well as the activity of sucrose phosphate synthase (SPS).
Improving the utilisation of available land area and external agricultural resources (e.g. light quality and water), via novel engineering and plant physiological solutions respectively, will deliver an efficient model of a vertical farm suitable for large scale vegetable production for the modern city such as Singapore. In 2012, Dr He Jie had received a Singapore Millennium Foundation (SMF) grant to work on “Integrated Vertical Aeroponic Farming (VAF) System: Towards Food Security and Sustainability in Singapore”. In this project, Dr He Jie’s team used an integrated VAF system with low energy input LED lighting which could increase not only cropping density per unit land area but also productivity in a cost-effective manner. Extensive development of integrated vertical aeroponic farming (VAF) systems would diminish Singapore’s reliance on vegetable imports, thus enhancing national food security.
Currently (2016 – 2019), Dr He Jie’s team is working on “Thermotolerance of temperate vegetable crops grown in the tropics: Physiological and biochemical mechanisms, productivity and quality. This research is two pronged: identifying the basal and acquired thermotolerance in selected vegetable crops and adopting sub-lethal heat stress regimes to boost adaptive thermotolerance in plants in horticultural applications. The effects of sub-lethal exposure to thermal stress (hardening) on physiology, molecular basis, productivity and quality would also be addressed.
Studying on the impacts of abiotic stresses (temperature and drought) on native tropical orchids; and physiology of orchid pseudobulbs are also Dr. He Jie’s current research interests. By understanding the mechanism(s) responsible for the photosynthetic performances of different green organs under different conditions, feasible strategies could be recommended to local nursery for enhancing the harvestable yield of tropical orchids. Understanding the response of lost native species to environmental factors would be an important step toward a sustainable conservation in Singapore. Currently, Dr He Jie is collaborating with Dr Tim W. Yam (Senior Researcher and Section Head, Conservation and Molecular Biology) in NParks on orchid conservation. She is offering short-term projects to both MLS and BSc final year students on responses of native orchids to growth irradiances and drought stress under natural conditions.
Improving the utilisation of available land area and external agricultural resources (e.g. light quality and water), via novel engineering and plant physiological solutions respectively, will deliver an efficient model of a vertical farm suitable for large scale vegetable production for the modern city such as Singapore. In 2012, Dr He Jie had received a Singapore Millennium Foundation (SMF) grant to work on “Integrated Vertical Aeroponic Farming (VAF) System: Towards Food Security and Sustainability in Singapore”. In this project, Dr He Jie’s team used an integrated VAF system with low energy input LED lighting which could increase not only cropping density per unit land area but also productivity in a cost-effective manner. Extensive development of integrated vertical aeroponic farming (VAF) systems would diminish Singapore’s reliance on vegetable imports, thus enhancing national food security.
Currently (2016 – 2019), Dr He Jie’s team is working on “Thermotolerance of temperate vegetable crops grown in the tropics: Physiological and biochemical mechanisms, productivity and quality. This research is two pronged: identifying the basal and acquired thermotolerance in selected vegetable crops and adopting sub-lethal heat stress regimes to boost adaptive thermotolerance in plants in horticultural applications. The effects of sub-lethal exposure to thermal stress (hardening) on physiology, molecular basis, productivity and quality would also be addressed.
Studying on the impacts of abiotic stresses (temperature and drought) on native tropical orchids; and physiology of orchid pseudobulbs are also Dr. He Jie’s current research interests. By understanding the mechanism(s) responsible for the photosynthetic performances of different green organs under different conditions, feasible strategies could be recommended to local nursery for enhancing the harvestable yield of tropical orchids. Understanding the response of lost native species to environmental factors would be an important step toward a sustainable conservation in Singapore. Currently, Dr He Jie is collaborating with Dr Tim W. Yam (Senior Researcher and Section Head, Conservation and Molecular Biology) in NParks on orchid conservation. She is offering short-term projects to both MLS and BSc final year students on responses of native orchids to growth irradiances and drought stress under natural conditions.
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Jie He, Klaudia Ng,Lin Qin,Yuanjie Shen,Harianto Rahardjo, Chien Looi Wang, Huiling Kew, Yong Chuan Chua, Choon Hock Poh, Subhadip Ghosh
PloS oneno. 2 (2024): e0298908-e0298908
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GEOTECHNICAL AND GEOLOGICAL ENGINEERINGno. 5 (2023): 3239-3252
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