Leaf Area Index, Water Index, and Red: Far Red Ratio Calculated by Spectral Reflectance and its Relation to Plant Architecture and Cut Rose Production

Mascarini, Libertad; Lorenzo, Gabriel Antonio; Vilella, F.

doi:10.21273/jashs.131.3.313

Cited by 10 publications

(3 citation statements)

References 28 publications

(37 reference statements)

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“…Spectral index values were estimated for each leaf using the mean of these 24 measurements. Spectral indices, including Water Band Index (WBI) for leaf water content (Peñuelas, Llusià, Piñol, & Filella, 1997), modified Normalized Difference Vegetation Index (mNDVI) for chlorophyll content (Fuentes, Gamon, Qiu, Sims, & Roberts, 2001), Photochemical Reflectance Index (PRI) for xanthophyll cycle pigments (Gamon, Peñuelas, & Field, 1992), red–green ratio (RGR) for anthocyanin content (Fuentes et al., 2001), Structure Intensive Pigment Index (SIPI) for carotenoid‐to‐chlorophyll a ratio (Peñuelas, Baret, & Filella, 1995), red–far‐red ratio (RFR) (Mascarini, Lorenzo, & Vilella, 2006), and Normalized Phaeophytinization Index (NPQI) for chlorophyll degradation (Barnes, Balaguer, Manrique, Elvira, & Davison, 1992), were calculated as follows,

WBI = \frac{R_{900}}{R_{970}}

mNDVI = \frac{R_{750} ‐ R_{705}}{R_{750} + R_{705}}

PRI = \frac{R_{531} ‐ R_{570}}{R_{531} + R_{570}}

RGR = \frac{{false\sum}_{n = 600}^{n = 699} R_{n}}{{false\sum}_{n = 500}^{n = 599} R_{n}}

SIPI = \frac{R_{800} ‐ R_{445}}{R_{800} ‐ R_{680}}

RFR = \frac{R_{680}}{R_{730}}

NPQI = \frac{R_{415} ‐ R_{435}}{R_{415} + R_{435}}

…”

Section: Methodsmentioning

confidence: 99%

“…Intensive Pigment Index (SIPI) for carotenoid-to-chlorophyll a ratio (Peñuelas, Baret, & Filella, 1995), red-far-red ratio (RFR) (Mascarini, Lorenzo, & Vilella, 2006), and Normalized Phaeophytinization Index (NPQI) for chlorophyll degradation (Barnes, Balaguer, Manrique, Elvira, & Davison, 1992), were calculated as follows,…”

Section: Spectral Analysis Of Leaves Using a Spectroradiometermentioning

confidence: 99%

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Light‐limited photosynthesis under energy‐saving film decreases eggplant yield

Chavan

Maier

Alagöz

et al. 2020

Food and Energy Security

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WBI = \frac{R_{900}}{R_{970}}

mNDVI = \frac{R_{750} ‐ R_{705}}{R_{750} + R_{705}}

PRI = \frac{R_{531} ‐ R_{570}}{R_{531} + R_{570}}

RGR = \frac{{false\sum}_{n = 600}^{n = 699} R_{n}}{{false\sum}_{n = 500}^{n = 599} R_{n}}

SIPI = \frac{R_{800} ‐ R_{445}}{R_{800} ‐ R_{680}}

RFR = \frac{R_{680}}{R_{730}}

NPQI = \frac{R_{415} ‐ R_{435}}{R_{415} + R_{435}}

…”

Section: Methodsmentioning

confidence: 99%

Section: Spectral Analysis Of Leaves Using a Spectroradiometermentioning

confidence: 99%

Light‐limited photosynthesis under energy‐saving film decreases eggplant yield

Chavan

Maier

Alagöz

et al. 2020

Food and Energy Security

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“…The interception of Photosynthetically active radiation (PAR) by the plant largely depends on leaf area, which tends to alter during plant growth and development. This relationship is quite significant, being correlated to the photosynthetic efficiency and biomass production in plants [ 40 , 41 , 42 ]. It is an established fact that an increased leaf area enhances photosynthetic efficiency of plants as reported in Chrysanthemum [ 43 , 44 , 45 ], Rose [ 42 ], Tulip [ 46 ], Gladiolus [ 47 ], and Eustoma [ 48 ].…”

Section: Discussionmentioning

confidence: 99%

Phenotypic Characterization and RT-qPCR Analysis of Flower Development in F1 Transgenics of Chrysanthemum × grandiflorum

Haider

Bashir

Habib

et al. 2021

Plants

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Gene silencing is the epigenetic regulation of any gene in order to prevent gene expression at the transcription or translation levels. Among various gene silencing techniques, RNA silencing (RNAi) is notable gene regulation technique that involves sequence-specific targeting and RNA degradation. However, the effectiveness of transgene-induced RNAi in F1 generation of chrysanthemum has not been studied yet. In the current study, we used RNAi-constructed CmTFL1 (white-flowered) and CmSVP overexpressed (yellow flowered) transgenic plants of previously conducted two studies for our experiment. Cross hybridization was performed between these intergeneric transgenic and non-transgenic plants of the winter-growing chrysanthemum selection “37” (light pink flowered). The transgene CmSVP was confirmed in F1 hybrids by RT-PCR analysis, whereas hybrids of CmTFL1 parental plants were non-transgenic. Besides this, quantitative real-time PCR (qPCR) was used to explain the molecular mechanism of flower development using reference genes. Intergeneric and interspecific hybrids produced different colored flowers unlike their respective parents. These results suggest that generic traits of CmSVP overexpressed plants can be transferred into F1 generations when crossed with mutant plants. This study will aid in understanding the breeding phenomenon among intergeneric hybrids of chrysanthemum plants at an in vivo level, and such transgenics will also be more suitable for sustainable flower yield under a low-light production system.

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