Changes in leaf optical properties during tomato, common lamb's‐quarters, and redroot pigweed plant development

2021 ◽  
Author(s):  
Li Ma ◽  
Mahesh K Upadhyaya
Keyword(s):  
Optical Properties ◽  
Plant Development ◽  
Redroot Pigweed ◽  
Leaf Optical Properties ◽  
Lamb’S Quarters

scholarly journals Plant ecophysiological processes in spectral profiles: perspective from a deciduous broadleaf forest

2021 ◽  
Author(s):  
Hibiki M. Noda ◽  
Hiroyuki Muraoka ◽  
Kenlo Nishida Nasahara
Keyword(s):  
Remote Sensing ◽  
Optical Properties ◽  
Spectral Reflectance ◽  
Canopy Structure ◽  
Terrestrial Ecosystems ◽  
Optical Remote Sensing ◽  
Canopy Reflectance ◽  
Broadleaf Forest ◽  
Leaf Optical Properties ◽  
Deciduous Broadleaf Forest

AbstractThe need for progress in satellite remote sensing of terrestrial ecosystems is intensifying under climate change. Further progress in Earth observations of photosynthetic activity and primary production from local to global scales is fundamental to the analysis of the current status and changes in the photosynthetic productivity of terrestrial ecosystems. In this paper, we review plant ecophysiological processes affecting optical properties of the forest canopy which can be measured with optical remote sensing by Earth-observation satellites. Spectral reflectance measured by optical remote sensing is utilized to estimate the temporal and spatial variations in the canopy structure and primary productivity. Optical information reflects the physical characteristics of the targeted vegetation; to use this information efficiently, mechanistic understanding of the basic consequences of plant ecophysiological and optical properties is essential over broad scales, from single leaf to canopy and landscape. In theory, canopy spectral reflectance is regulated by leaf optical properties (reflectance and transmittance spectra) and canopy structure (geometrical distributions of leaf area and angle). In a deciduous broadleaf forest, our measurements and modeling analysis of leaf-level characteristics showed that seasonal changes in chlorophyll content and mesophyll structure of deciduous tree species lead to a seasonal change in leaf optical properties. The canopy reflectance spectrum of the deciduous forest also changes with season. In particular, canopy reflectance in the green region showed a unique pattern in the early growing season: green reflectance increased rapidly after leaf emergence and decreased rapidly after canopy closure. Our model simulation showed that the seasonal change in the leaf optical properties and leaf area index caused this pattern. Based on this understanding we discuss how we can gain ecophysiological information from satellite images at the landscape level. Finally, we discuss the challenges and opportunities of ecophysiological remote sensing by satellites.

scholarly journals An extended PROSPECT: Advance in the leaf optical properties model separating total chlorophylls into chlorophyll a and b

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Yao Zhang ◽  
Jingfeng Huang ◽  
Fumin Wang ◽  
George Alan Blackburn ◽  
Hankui K. Zhang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Chlorophyll A ◽  
Leaf Optical Properties ◽  
Chlorophyll A And B

FASPECT: A model of leaf optical properties accounting for the differences between upper and lower faces

2021 ◽  
Vol 253 ◽  
pp. 112205
Author(s):  
Jingyi Jiang ◽  
Alexis Comar ◽  
Marie Weiss ◽  
Frédéric Baret
Keyword(s):  
Optical Properties ◽  
Leaf Optical Properties

scholarly journals PROSPECT-D: Towards modeling leaf optical properties through a complete lifecycle

2017 ◽  
Vol 193 ◽  
pp. 204-215 ◽  
Author(s):  
J.-B. Féret ◽  
A.A. Gitelson ◽  
S.D. Noble ◽  
S. Jacquemoud
Keyword(s):  
Optical Properties ◽  
Leaf Optical Properties

Leaf Optical Properties

1985 ◽  
pp. 107-127 ◽  
Author(s):  
Danuše Hodáňová
Keyword(s):  
Optical Properties ◽  
Leaf Optical Properties

Calcium oxalate druses affect leaf optical properties in selenium-treated Fagopyrum tataricum

2018 ◽  
Vol 180 ◽  
pp. 51-55 ◽  
Author(s):  
Aleksandra Golob ◽  
Vekoslava Stibilj ◽  
Marijan Nečemer ◽  
Peter Kump ◽  
Ivan Kreft ◽  
...  
Keyword(s):  
Optical Properties ◽  
Calcium Oxalate ◽  
Fagopyrum Tataricum ◽  
Leaf Optical Properties

Combined Effects of Hemlock Woolly Adelgid (Adelges tsugae) Infestation and Treatment with Imidacloprid on Eastern Hemlock (Tsuga canadensis) Leaf Radiometry

2019 ◽  
Vol 117 (4) ◽  
pp. 340-350 ◽  
Author(s):  
Heath W Garris ◽  
Thomas H Settle ◽  
Jonathan E Crossman ◽  
Stephen J Grider ◽  
Shawnté L Michaels
Keyword(s):  
Optical Properties ◽  
Tsuga Canadensis ◽  
Hemlock Woolly Adelgid ◽  
Adelges Tsugae ◽  
Eastern Hemlock ◽  
Abiotic Stressors ◽  
Leaf Optical Properties ◽  
Photosynthetic Potential ◽  
And Control ◽  
Potential Efficiency

Abstract The neonicotinoid systemic insecticide imidacloprid has proven to be an effective treatment for the prevention and control of hemlock woolly adelgid (Adelges tsugae Annand) in southeastern populations of eastern hemlock (Tsuga canadensis L.). Recent studies have demonstrated that imidacloprid and A. tsugae both stimulate salicylic acid-dependent physiological responses in plant tissues responsible for plant defenses against pathogens, timing of developmental outcomes including flowering and leaf senescence, and resilience to abiotic stressors. We evaluated the interacting effects of A. tsugae presence/absence and treatment with imidacloprid on leaf optical properties indicative of photosynthetic potential, photosynthetic efficiency, and tissue senescence. Our results indicated that A. tsugae changes lower canopy leaf optical properties indicative of reduced photosynthetic potential/efficiency and accelerated senescence in mature leaves. Imidacloprid was associated with declines in photosynthetic potential and showed a largely similar, though less pronounced, effect on leaf spectral properties to that of A. tsugae.

Optical properties of leaves in relation to anthocyanin concentration and distribution

2000 ◽  
Vol 77 (12) ◽  
pp. 1777-1782 ◽  
Author(s):  
Sam Neill ◽  
Kevin S Gould
Keyword(s):  
Optical Properties ◽  
New Zealand ◽  
Red Light ◽  
Pigment Concentration ◽  
Anthocyanin Content ◽  
Tacit Assumption ◽  
Content Variation ◽  
Leaf Optical Properties ◽  
Anthocyanin Concentration ◽  
Anthocyanin Production

We have tested the tacit assumption that the location of anthocyanic cells within a leaf affects the quality and quantity of light that is absorbed. Leaf optics are described for Quintinia serrata A. Cunn., a native New Zealand tree that is polymorphic for anthocyanin distribution and concentration. Anthocyanin production enhanced the absorptance of green-yellow wavelengths in proportion to pigment concentration. The reflectance of red light was independent of leaf anthocyanin content. Variation in the location of pigmented cells could not account for differences in leaf optics. The effects of anthocyanin on PAR absorptance were consistent across six further, unrelated species that bore red leaves. We conclude that anthocyanin concentration, rather than its histological distribution, has the greater impact on leaf optical properties.

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