scholarly journals Canopy Vegetation Indices from In situ Hyperspectral Data to Assess Plant Water Status of Winter Wheat under Powdery Mildew Stress

2017 ◽  
Vol 8 ◽  
Author(s):  
Wei Feng ◽  
Shuangli Qi ◽  
Yarong Heng ◽  
Yi Zhou ◽  
Yapeng Wu ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Winter Wheat ◽  
Water Status ◽  
Vegetation Indices ◽  
Hyperspectral Data ◽  
Plant Water Status ◽  
Plant Water

Retrieval of Water Use Efficiency Using Hyperspectral Indices: An Application for Tamarix ramosissima

2012 ◽  
Vol 500 ◽  
pp. 149-154
Author(s):  
Shan Shan Wang ◽  
Xi Chen ◽  
Quan Wang ◽  
An Ming Bao
Keyword(s):  
Water Status ◽  
Field Measurements ◽  
Hyperspectral Data ◽  
Plant Water Status ◽  
Tamarix Ramosissima ◽  
Sensitivity Index ◽  
Plant Water ◽  
Arid Ecosystem ◽  
Desert Shrubs ◽  
Wide Range

Many fundamental ecosystem properties and dynamics are monitored by plant water status, particularly in arid ecosystem where water is usually limiting. Although plant water status have been widely assessed using field measurements by ecological methods, approaches for remotely sensing plant water status are largely lacking, particularly diurnal water status. In arid ecosystem, WUE is a dynamic indicator for detecting water status, but also an integrated index for correlating to the plant photosynthesis. In our study, the experiments were conducted on native dominant desert shrub, Tamarix ramosissima, in their original habitats on the southern periphery of Gurbantonggut desert, China. We explored sensitive and useful hyperspectral indices for estimating diurnal WUE at a leaf scale based on diurnal measurements of hyperspectral reflectance, photosynthesis and micrometeorological variables. According to the statistical analysis of relationships between spectral indices and WUE estimation, SR type hyperspectral index is the sensitivity index for WUE estimation. Our results provide useful insights for monitoring desert shrubs diurnal and dynamic water status, using a wide range of available hyperspectral data.

scholarly journals A minimally disruptive method for measuring water potential in planta using hydrogel nanoreporters

2021 ◽  
Vol 118 (23) ◽  
pp. e2008276118
Author(s):  
Piyush Jain ◽  
Weizhen Liu ◽  
Siyu Zhu ◽  
Christine Yao-Yun Chang ◽  
Jeff Melkonian ◽  
...  
Keyword(s):  
Water Potential ◽  
Leaf Water Potential ◽  
Water Status ◽  
Resonance Energy ◽  
Field Measurements ◽  
Leaf Water ◽  
Plant Water Status ◽  
Plant Water ◽  
In Planta

Leaf water potential is a critical indicator of plant water status, integrating soil moisture status, plant physiology, and environmental conditions. There are few tools for measuring plant water status (water potential) in situ, presenting a critical barrier for developing appropriate phenotyping (measurement) methods for crop development and modeling efforts aimed at understanding water transport in plants. Here, we present the development of an in situ, minimally disruptive hydrogel nanoreporter (AquaDust) for measuring leaf water potential. The gel matrix responds to changes in water potential in its local environment by swelling; the distance between covalently linked dyes changes with the reconfiguration of the polymer, leading to changes in the emission spectrum via Förster Resonance Energy Transfer (FRET). Upon infiltration into leaves, the nanoparticles localize within the apoplastic space in the mesophyll; they do not enter the cytoplasm or the xylem. We characterize the physical basis for AquaDust’s response and demonstrate its function in intact maize (Zea mays L.) leaves as a reporter of leaf water potential. We use AquaDust to measure gradients of water potential along intact, actively transpiring leaves as a function of water status; the localized nature of the reporters allows us to define a hydraulic model that distinguishes resistances inside and outside the xylem. We also present field measurements with AquaDust through a full diurnal cycle to confirm the robustness of the technique and of our model. We conclude that AquaDust offers potential opportunities for high-throughput field measurements and spatially resolved studies of water relations within plant tissues.

Recalibrating plant water status of winter wheat based on nitrogen nutrition index using thermal images

2021 ◽  
Author(s):  
Ben Zhao ◽  
Traore Adama ◽  
Syed Tahir Ata-Ul-Karim ◽  
Yan Guo ◽  
Zhandong Liu ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Nitrogen Nutrition ◽  
Water Status ◽  
Plant Water Status ◽  
Plant Water ◽  
Thermal Images ◽  
Nitrogen Nutrition Index

Quantitative Identification of Yellow Rust, Powdery Mildew and Fertilizer-Water Stress in Winter Wheat Using In-Situ Hyperspectral Data

2014 ◽  
Vol 12 (3) ◽  
pp. 876-882 ◽  
Author(s):  
Qingsong Guan ◽  
Wenjiang Huang ◽  
Jinling Zhao ◽  
Liangyun Liu ◽  
Dong Liang ◽  
...  
Keyword(s):  
Water Stress ◽  
Powdery Mildew ◽  
Winter Wheat ◽  
Yellow Rust ◽  
Hyperspectral Data ◽  
Quantitative Identification

scholarly journals A minimally disruptive method for measuring water potential in-planta using hydrogel nanoreporters

2020 ◽  
Author(s):  
Piyush Jain ◽  
Weizhen Liu ◽  
Siyu Zhu ◽  
Jeff Melkonian ◽  
Duke Pauli ◽  
...  
Keyword(s):  
Water Potential ◽  
Leaf Water Potential ◽  
Water Status ◽  
Resonance Energy ◽  
Field Measurements ◽  
Leaf Water ◽  
Plant Water Status ◽  
Plant Water ◽  
In Planta

AbstractLeaf water potential is a critical indicator of plant water status, integrating soil moisture status, plant physiology, and environmental conditions. There are few tools for measuring plant water status (water potential) in situ, presenting a critical barrier for the development of appropriate phenotyping (measurement) methods for crop development and modeling efforts aimed at understanding water transport in plants. Here, we present the development of an in situ, minimally-disruptive hydrogel nanoreporter (AquaDust) for measuring leaf water potential. The gel matrix responds to changes in water potential in its local environment by swelling; the distance between covalently linked dyes changes with the reconfiguration of the polymer, leading to changes in the emission spectrum via Fluorescence Resonance Energy Transfer (FRET). Upon infiltration into leaves, the nanoparticles localize within the apoplastic space in the mesophyll; they do not enter the cytoplast or the xylem. We characterize the physical basis for AquaDust’s response and demonstrate its function in intact maize (Zea mays L.) leaves as a reporter of leaf water potential. We use AquaDust to measure gradients of water potential along intact, actively transpiring leaves as a function of water status; the localized nature of the reporters allows us to define a hydraulic model that distinguishes resistances inside and outside the xylem. We also present field measurements with AquaDust through a full diurnal cycle to confirm the robustness of the technique and of our model. We conclude that AquaDust offers potential opportunities for high-throughput, field measurements and spatially resolved studies of water relations within plant tissues.

scholarly journals Assessment of plant water status in winter wheat (Triticum aestivum L.) based on canopy spectral indices

PLoS ONE ◽  
2019 ◽  
Vol 14 (6) ◽  
pp. e0216890 ◽  
Author(s):  
Hui Sun ◽  
Meichen Feng ◽  
Lujie Xiao ◽  
Wude Yang ◽  
Chao Wang ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Water Status ◽  
Triticum Aestivum L ◽  
Plant Water Status ◽  
Plant Water ◽  
Spectral Indices

The Method of Plant Water Status Measurement in Sweet Potato (Ipomoea Batatas (L) Lam.)

2010 ◽  
Vol 7 (1) ◽  
Author(s):  
Saraswati Prabawardani
Keyword(s):  
Water Content ◽  
Sweet Potato ◽  
Relative Water Content ◽  
Water Status ◽  
Plant Water Status ◽  
Equilibration Time ◽  
Plant Water ◽  
Font Size ◽  
Potato Leaf ◽  
Relative Water

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Plant Water Status in Relation to Clouds 1

1973 ◽  
Vol 65 (4) ◽  
pp. 677-678 ◽  
Author(s):  
J. R. Stansell ◽  
Betty Klepper ◽  
V. Douglas Browning ◽  
H. M. Taylor
Keyword(s):  
Water Status ◽  
Plant Water Status ◽  
Plant Water
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