Foliar SPAD-502 Meter Values, Nitrogen Levels, and Extractable Chlorophyll for Red Maple Selections

Sibley, Jeff L.; Eakes, D. Joseph; Gilliam, Charles H.; Keever, Gary J.; Dozier, W. A.; Himelrick, David G.

doi:10.21273/hortsci.31.3.468

Cited by 63 publications

(28 citation statements)

References 13 publications

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“…A largest percentage increase in the root/ shoot ratio in ZD958 (Table 1) Table S2). The SPAD value is positively correlated with the chlorophyll content in the leaf as a critical indicator of internal N nutritional status (Sibley et al 1996;Chapman and Baretto 1997). ZD958 had the lowest SPAD values in the 4th leaf among seven examined lines (Fig.…”

Section: Discussionmentioning

confidence: 95%

ZD958 is a low-nitrogen-efficient maize hybrid at the seedling stage among five maize and two teosinte lines

Han

Wang

Zheng

et al. 2015

Planta

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ZD958 was the most low-N-efficient line among five maize and two teosinte lines. Zea parviglumis and Zea diploperennis were insensitive to N limitation. Maize and teosinte genetically and evolutionarily diverged in gene regulation. GDH2, ASN2, and T4 were consistently down-regulated across seven lines. Maternal asymmetric inheritance and heterosis vigor made ZD958 low-N-efficient. Nitrogen (N) deficiency remains a serious limiting factor for maize production in many developing countries. It is particularly important to better understand how hybrid maize responds to N limitation. ZD958, a dominant high-yield hybrid in North China, was comparatively analyzed with four other maize and two teosinte lines at physiological and transcriptional levels. ZD958 was the most low-N-efficient line among five maize and two teosinte lines due to its largest biomass accumulation at a lowest N concentration under N limitation; while Zea parviglumis and Zea diploperennis had large root systems and were insensitive to N limitation. In anti-parallel with down-regulation of N metabolic genes in the ZD958 root, carbon allocation towards the root was enhanced for the significant increase in the root length. Variations in expression patterns of ten genes mediating N uptake, transport, and metabolism indicated large genetic and evolutionary divergence among seven lines under N limitation. Notably, GDH2, ASN2, and VAAT5 were consistently down-regulated under N limitation across these maize and teosinte lines, suggesting essential evolutionary conservation of gene regulation in response to N limitation and providing molecular markers for N nutritional diagnosis. Asymmetric inheritance, mostly from its maternal donor Z58, and heterosis vigor made ZD958 low-N-efficient at the seedling stage. The superior traits in crown roots in ZD958 may be derived from its paternal donor Chang7-2. Thus, Z58, Chang7-2, and two wild maize lines (Z. parviglumis and Z. diploperennis) provide valuable germplasms for N-efficient and large-root maize breeding.

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Section: Discussionmentioning

confidence: 95%

ZD958 is a low-nitrogen-efficient maize hybrid at the seedling stage among five maize and two teosinte lines

Han

Wang

Zheng

et al. 2015

Planta

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“…Neilsen et al (1995) observed significant correlations between CCI and foliar nitrogen concentration in four apple cultivars early, but not late, in the growing season. However, in a study that examined 12 red maple cultivars as a group, Sibley et al (1996) found no significant correlations between CCI and foliar nitrogen. These latter two studies illustrate some limitations of chlorophyll meters.…”

Section: Introductionmentioning

confidence: 91%

“…Significant correlations have been reported for CCI and total chlorophyll in paper birch (Betula papyrifera Marsh.) (Richardson et al, 2002), red maple (Acer rubrum L.) (Sibley et al, 1996) (Campbell et al, 1990). Cate and Perkins (2003) reported significant correlations between CCI and total chlorophyll in sugar maple (Acer saccharum Marsh.)…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a portable chlorophyll meter to estimate chlorophyll and nitrogen contents in sugar maple (Acer saccharum Marsh.) leaves

Berg

Perkins

2004

Forest Ecology and Management

136

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“…Compared to more expensive extraction methods, the SPAD meter can rapidly estimate chlorophyll content (Azia and Stewart 2001;Madeira et al 2003;Yamamoto et al 2002). In plant nutrition studies, the SPAD meter has been successfully used to estimate nitrogen status in apple (Neilsen et al 1995), tomato (Sandoval-Villa et al 2002, red maple (Sibley et al 1996), and corn (Smeal and Zhang 1994) among other crops (Schepers et al 1998). Loh et al (2002) used a SPAD meter to quantitatively evaluate Populus deltoides foliage quality and calibrated the instrument based on chlorophyll and nitrogen content.…”

Section: Introductionmentioning

confidence: 99%

Can soil plant analysis development values predict chlorophyll and total Fe in hybrid poplar?

et al. 2009

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Iron chlorosis caused by an elevated soil pH remains an important selection criteria in evaluating hybrid Populus trials in northwest New Mexico. Compared to expensive extraction methods or visual ranking scales, the soil plant analysis development (SPAD) chlorophyll meter is a handheld tool that objectively indicates leaf color. SPAD calibration curves pertaining to Fe status in Populus leaves were developed for two clones: NM-6 (Populus nigra 9 Populus maximowiczii) and OP-367 (Populus deltoides 9 Populus nigra). Hybrids were grown in the greenhouse in a sandy loam soil of pH [ 8 and the same soil amended with composted biosolids enriched with 420 mg kg -1 Fe. SPAD measurements related to foliar Fe as follows: r 2 = 0.72 for NM-6 and r 2 = 0.58 for OP-367. SPAD measurements correlated with total chlorophyll as follows: r 2 = 0.66 for NM-6 and r 2 = 0.85 for OP-367. Based on the total chlorophyll content (supported with foliar element data), Fe sufficiency threshold values from SPAD measurements were estimated in these two clones.

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Foliar SPAD-502 Meter Values, Nitrogen Levels, and Extractable Chlorophyll for Red Maple Selections

Cited by 63 publications

References 13 publications

ZD958 is a low-nitrogen-efficient maize hybrid at the seedling stage among five maize and two teosinte lines

ZD958 is a low-nitrogen-efficient maize hybrid at the seedling stage among five maize and two teosinte lines

Evaluation of a portable chlorophyll meter to estimate chlorophyll and nitrogen contents in sugar maple (Acer saccharum Marsh.) leaves

Can soil plant analysis development values predict chlorophyll and total Fe in hybrid poplar?

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