scholarly journals The Changes of Leaf Reflectance Spectrum and Leaf Functional Traits of Osmanthus fragrans Are Related to the Parasitism of Cuscuta japonica

2021 ◽  
Vol 11 (4) ◽  
pp. 1937
Author(s):  
Jiyou Zhu ◽  
Qing Xu ◽  
Jiangming Yao ◽  
Xinna Zhang ◽  
Chengyang Xu
Keyword(s):  
Host Plant ◽  
Chlorophyll Content ◽  
Functional Traits ◽  
Spectral Reflectance ◽  
Spectral Parameters ◽  
Osmanthus Fragrans ◽  
Leaf Functional Traits ◽  
Leaf Economics Spectrum ◽  
Cuscuta Japonica ◽  
Leaf Economics

Studies on the influence of parasitism on plants based on hyperspectral analysis have not been reported so far. To fully understand the variation characteristics and laws of leaf reflectance spectrum and functional traits after the urban plant parasitized by Cuscuta japonica Choisy. Osmanthus fragrans (Thunb.) Lour. was taken as the research object to analyze the spectral reflectance and functional traits characteristics at different parasitical stages. Results showed that the spectral reflectance was higher than those being parasitized in the visible and near-infrared range. The spectral reflectance in 750~1400 nm was the sensitive range of spectral response of host plant to parasitic infection, which is universal at different parasitic stages. We established a chlorophyll inversion model (y = −65913.323x + 9.783, R2 = 0.6888) based on the reflectance of red valley, which can be used for chlorophyll content of the parasitic Osmanthus fragrans. There was a significant correlation between spectral parameters and chlorophyll content index. Through the change of spectral parameters, we can predict the chlorophyll content of Osmanthus fragrans under different parasitic degrees. After being parasitized, the leaf functional traits of host plant were generally characterized by large leaf thickness, small leaf area, small specific leaf area, low relative chlorophyll content, high leaf dry matter content and high leaf tissue density. These findings indicate that the host plant have adopted a certain trade-off strategy to maintain their growth in the invasion environment of parasitic plants. Therefore, we suspect that the leaf economics spectrum may also exist in the parasitic environment, and there was a general trend toward the “slow investment-return” type in the global leaf economics spectrum.

scholarly journals The Changes of Leaf Reflectance Spectrum and Leaf Functional Traits of Osmanthus Fragrans are Related to the Parasitism of Cuscuta Japonica

2020 ◽  
Author(s):  
Jiyou Zhu ◽  
Qing Xu ◽  
Weijun He ◽  
Jiangming Yao ◽  
Xinna Zhang ◽  
...  
Keyword(s):  
Chlorophyll Content ◽  
Functional Traits ◽  
Spectral Reflectance ◽  
Reflectance Spectrum ◽  
Parasitic Plants ◽  
Osmanthus Fragrans ◽  
Leaf Functional Traits ◽  
Leaf Economics Spectrum ◽  
Cuscuta Japonica ◽  
Leaf Economics

Abstract Background: Studies on the influence of parasitism on plants based on hyperspectral analysis have not been reported so far. To fully understand the variation characteristics and laws of leaf reflectance spectrum and functional traits after the urban plant parasitized by Cuscuta japonica Choisy. Osmanthus fragrans (Thunb.) Lour. was taken as the research object to analyze the spectral reflectance and functional traits characteristics at different parasitical stages. Results: Results showed that the spectral reflectance was higher than the parasitic reflectance in the visible light and near infrared. The spectral reflectance in 750 ~ 1400 nm was the sensitive range of spectral response of host plants to parasitic infection, which is universal at different parasitic stages. We established a chlorophyll inversion model (y=-65913.323x+9.783, R2=0.6888) based on the reflectance of red valley (minimum band reflectance in the range of 640 ~ 700 nm), which can be used for chlorophyll content of the parasitic Osmanthus fragrans. There was a significant correlation between spectral characteristic parameters and chlorophyll content index. Through the change of spectral parameters, we can predict the chlorophyll content of Osmanthus fragrans under different parasitism degrees.Conclusion: After the host plant was invaded by parasitic plants, its leaf functional traits are generally characterized by thick leaf, small leaf area, small specific leaf area, low relative chlorophyll content, high dry matter content and high leaf tissue density. These findings indicate that the host plant have taken certain trade-off strategy to maintain their growth in the environment invaded by parasitic plants. Therefore, we suspect that there may be leaf economics spectrum in the parasitic environment, and there was a general trend toward "slow investment-return" in the global leaf economics spectrum.

scholarly journals Is the Seasonal Variation in Frost Resistance and Plant Performance in Four Oak Species Affected by Changing Temperatures?

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 369
Author(s):  
Maggie Preißer ◽  
Solveig Franziska Bucher
Keyword(s):  
Seasonal Variation ◽  
Chlorophyll Content ◽  
Functional Traits ◽  
Frost Resistance ◽  
Photosynthetic Performance ◽  
Leaf Thickness ◽  
Plant Performance ◽  
Deciduous Species ◽  
Leaf Functional Traits ◽  
Trade Off

Research Highlights: We found seasonal variation in frost resistance (FR) and plant performance which were affected by growth temperature. This helps to better understand ecophysiological processes in the light of climate change. Background and Objectives: FR and photosynthesis are important plant characteristics that vary with the season. The aim of this study was to find out whether there is a seasonal variation in FR, photosynthetic CO2 assimilation rates and leaf functional traits associated with performance such as specific leaf area (SLA), leaf dry matter content (LDMC), chlorophyll content, stomatal characteristics and leaf thickness in two evergreen and two deciduous species, and whether this is influenced by different temperature treatments. Additionally, the trade-off between FR and photosynthetic performance, and the influence of leaf functional traits was analyzed. By understanding these processes better, predicting species behavior concerning plant performance and its changes under varying climate regimes can be improved. Materials and Methods: 40 individuals of four oak species were measured weekly over the course of ten months with one half of the trees exposed to frost in winter and the other half protected in the green house. Two of these species were evergreen (Quercus ilex L., Quercus rhysophylla Weath.), and two were deciduous (Quercus palustris L., Quercus rubra L.). We measured FR, the maximum assimilation rate at light saturation under ambient CO2 concentrations (Amax), chlorophyll fluorescence and the leaf functional traits SLA, LDMC, stomatal pore area index (SPI), chlorophyll content (Chl) and leaf thickness. Results: All parameters showed a significant species-specific seasonal variation. There was a difference in all traits investigated between evergreen and deciduous species and between the two temperature treatments. Individuals that were protected from frost in winter showed higher photosynthesis values as well as SLA and Chl, whereas individuals exposed to frost had overall higher FR, LDMC, SPI and leaf thickness. A trade-off between FR and SLA, rather than FR and photosynthetic performance was found.

scholarly journals Digging into the roots: understanding direct and indirect drivers of ecosystem service trade-offs in coastal grasslands via plant functional traits

2021 ◽  
Vol 193 (S1) ◽  
Author(s):  
Miguel A. Cebrián-Piqueras ◽  
Juliane Trinogga ◽  
Anastasia Trenkamp ◽  
Vanessa Minden ◽  
Martin Maier ◽  
...  
Keyword(s):  
Land Use ◽  
Functional Traits ◽  
Environmental Gradients ◽  
Plant Functional Traits ◽  
Forage Production ◽  
Trade Off ◽  
Leaf Economics Spectrum ◽  
Ecosystem Properties ◽  
Trade Offs ◽  
Leaf Economics

AbstractRecent empirical and theoretical approaches have called for an understanding of the processes underpinning ecosystem service provision. Environmental gradients have shown effects on key plant functional traits that subsequently explain ecosystem properties of several systems. However, little is known concerning how associations between plant functional traits, including both below- and aboveground plant components, predict ecosystem properties and independently measured final ecosystem services. Here, we modeled (1) the responses of the leaf and plant economics spectrum, Plant size axis, and root growth to environmental gradients and (2) how associations between plant functional traits explain trade-offs and synergies between multiple ecosystem properties and final services. Forty-four plots were studied in a coastal marsh landscape of the German North Sea Coast. We used a partial least square structural equation model approach to test the hypothesized model. We found (1) a negative covariation between plant traits pertaining to a size axis and traits explaining both plant growth (roots and stems) and the leaf economics spectrum; (2) this trade-off responded significantly to the land use gradient and nutrient availability, which were both strongly driven by the groundwater gradient; (3) this trade-off explained an initial major trade-off between carbon stocks, at one extreme of the axis, and both the habitat value to conserve endangered plants and forage production for meat and dairy products at the other extreme. However, a secondary trade-off between nature conservation value and forage production, explained by a trade-off between leaf economics spectrum and plant growth in response to the land use intensity gradient, was also found.

Mistletoes and their eucalypt hosts differ in the response of leaf functional traits to climatic moisture supply

Oecologia ◽  
2021 ◽  
Vol 195 (3) ◽  
pp. 759-771
Author(s):  
Jeannine H. Richards ◽  
Jonathan J. Henn ◽  
Quinn M. Sorenson ◽  
Mark A. Adams ◽  
Duncan D. Smith ◽  
...  
Keyword(s):  
Functional Traits ◽  
Leaf Functional Traits ◽  
Moisture Supply

Use of spectral reflectance from a compact spectrometer to assess chlorophyll content in Zizania latifolia

2021 ◽  
pp. 1-13
Author(s):  
Rei Sonobe ◽  
Hiroto Yamashita ◽  
Adenan Yandra Nofrizal ◽  
Haruyuki Seki ◽  
Akio Morita ◽  
...  
Keyword(s):  
Chlorophyll Content ◽  
Spectral Reflectance ◽  
Zizania Latifolia
Sign in / Sign up

Export Citation Format

Share Document