Water stress effects on stem diameter variations （SDV） were studied in a pot experiment on cotton （Gossypium hirustum L. Meimian99B）. Water restriction was imposed at the flowering stage and were compared with a w...Water stress effects on stem diameter variations （SDV） were studied in a pot experiment on cotton （Gossypium hirustum L. Meimian99B）. Water restriction was imposed at the flowering stage and were compared with a well-watered control treatment. The volumetric soil water content （0v） and SDV were monitored continuously. The objective was to determine the feasibility of using the parameters derived from stem diameter measurements, including maximum daily stem shrinkage （MDS）, maximum daily stem diameter （MXSD）, and minimum daily stem diameter （MNSD） as indicators of plant water stress. The different behavior of SDV was founded at different growth stages. At stem-maturing stage, MDS increased and MNSD decreased in deficit-irrigated plants compared with the control plants, therefore, it appeared that MDS and MNSD ccould be used as available indicators of plant water status. At stem growth stage, there were no significant differences in MDS values between treatments but MXSD and MNSD responded sharply to soil water deficits. Thus, for rapidly growing cotton, the course of MXSD or MNSD with time offered a consistent stress indicator. SDV was also closely related to atmospheric factors, solar radiation （Rs） and vapor pressure deficit （VPD） were found to be the predominant factors affecting MDS, followed by the relative humidity （RH）, while air temperature （Ta） and wind velocity had the least effect. A good linear relationship was founded （r^2 = 0.921） between MDS and environmental variables （Rs, VPD, RH, and θv）, which can be used to establish a reference value for detecting plant water stress based on the MDS patterns.展开更多
The integration offlexible electronics with plant science has generated various plant-wearable sensors,yet challenges persist in their application to real-world agriculture,particularly in high-throughput set-tings.Ov...The integration offlexible electronics with plant science has generated various plant-wearable sensors,yet challenges persist in their application to real-world agriculture,particularly in high-throughput set-tings.Overcoming the trade-off between sensing sensitivity and range,adapting sensors to a wide range of crop types,and bridging the gap between sensor measurements and biological understandings remain primary obstacles.Here,we introduce PlantRing,an innovative,nano-flexible sensing system designed to address these challenges.PlantRing employs bio-sourced carbonized silk georgette as the strain-sensing material,offering an exceptional detection limit(0.03%–0.17%strain,depending on sensor model),high stretchability(tensile strain up to 100%),and remarkable durability(season-long use).PlantRing effectively monitors plant growth and water status by measuring organ circumference dy-namics,performing reliably under harsh conditions,and adapting to a wide range of plant species.Applying PlantRing to study fruit cracking in tomato and watermelon has revealed a novel hydraulic mechanism characterized by genotype-specific excess sapflow within the plant to fruiting branches.Its high-throughput application has enabled large-scale quantification of stomatal sensitivity to soil drought—a long-standing aspiration in plant biology—facilitating the selection of drought-tolerant germ-plasm.Combining PlantRing with a soybean mutant has led to the discovery of a potential novel function of the circadian clock gene GmLNK2 in stomatal regulation.More practically,integrating PlantRing into feedback irrigation achieves simultaneous water conservation and quality improvement,signifying a paradigm shift from reliance on experience or environmental cues to plant-based feedback control.Collectively,PlantRing represents a groundbreaking tool poised to revolutionize botanical studies,agri-culture,and forestry.展开更多
文摘Water stress effects on stem diameter variations （SDV） were studied in a pot experiment on cotton （Gossypium hirustum L. Meimian99B）. Water restriction was imposed at the flowering stage and were compared with a well-watered control treatment. The volumetric soil water content （0v） and SDV were monitored continuously. The objective was to determine the feasibility of using the parameters derived from stem diameter measurements, including maximum daily stem shrinkage （MDS）, maximum daily stem diameter （MXSD）, and minimum daily stem diameter （MNSD） as indicators of plant water stress. The different behavior of SDV was founded at different growth stages. At stem-maturing stage, MDS increased and MNSD decreased in deficit-irrigated plants compared with the control plants, therefore, it appeared that MDS and MNSD ccould be used as available indicators of plant water status. At stem growth stage, there were no significant differences in MDS values between treatments but MXSD and MNSD responded sharply to soil water deficits. Thus, for rapidly growing cotton, the course of MXSD or MNSD with time offered a consistent stress indicator. SDV was also closely related to atmospheric factors, solar radiation （Rs） and vapor pressure deficit （VPD） were found to be the predominant factors affecting MDS, followed by the relative humidity （RH）, while air temperature （Ta） and wind velocity had the least effect. A good linear relationship was founded （r^2 = 0.921） between MDS and environmental variables （Rs, VPD, RH, and θv）, which can be used to establish a reference value for detecting plant water stress based on the MDS patterns.
基金the Key Scientific and Technological Grant of Zhejiang for Breeding New Agricultural Varieties(2021C02066-5,2021C02067-7)for their support。
文摘The integration offlexible electronics with plant science has generated various plant-wearable sensors,yet challenges persist in their application to real-world agriculture,particularly in high-throughput set-tings.Overcoming the trade-off between sensing sensitivity and range,adapting sensors to a wide range of crop types,and bridging the gap between sensor measurements and biological understandings remain primary obstacles.Here,we introduce PlantRing,an innovative,nano-flexible sensing system designed to address these challenges.PlantRing employs bio-sourced carbonized silk georgette as the strain-sensing material,offering an exceptional detection limit(0.03%–0.17%strain,depending on sensor model),high stretchability(tensile strain up to 100%),and remarkable durability(season-long use).PlantRing effectively monitors plant growth and water status by measuring organ circumference dy-namics,performing reliably under harsh conditions,and adapting to a wide range of plant species.Applying PlantRing to study fruit cracking in tomato and watermelon has revealed a novel hydraulic mechanism characterized by genotype-specific excess sapflow within the plant to fruiting branches.Its high-throughput application has enabled large-scale quantification of stomatal sensitivity to soil drought—a long-standing aspiration in plant biology—facilitating the selection of drought-tolerant germ-plasm.Combining PlantRing with a soybean mutant has led to the discovery of a potential novel function of the circadian clock gene GmLNK2 in stomatal regulation.More practically,integrating PlantRing into feedback irrigation achieves simultaneous water conservation and quality improvement,signifying a paradigm shift from reliance on experience or environmental cues to plant-based feedback control.Collectively,PlantRing represents a groundbreaking tool poised to revolutionize botanical studies,agri-culture,and forestry.
