Chlorophyll fluorescence of the testa of Brassica oleracea seeds as an indicator of seed maturity and seed quality

Jalink, H.; Frandas, A.; Schoor, R. van der; Bino, J.B.

doi:10.1590/s0103-90161998000500016

Cited by 34 publications

(45 citation statements)

References 7 publications

(6 reference statements)

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“…In nature, accumulation of low biomass by seed plants may translate into low field performance. It is important to note that relation between our 1000-seed weight and chlorophyll content is apparently inverse, a finding which is in agreement with Jalink et al, (1998a), who also suggested that seed quality was inverse to the amount of chlorophyll in the seed coat.…”

Section: Discussionsupporting

confidence: 89%

“…Seed chlorophyll content may be low or absent when plants grow, and produce mature fruits under favorable environmental conditions. Jalink et al, (1998a) reported that the amount of chlorophyll in the seed coat decreases during maturation, a process known as 'degreening'. Seed-filling appears to be one of the most critical stages during seed development, as any adverse environmental stress during this process may result in seed chlorophyll accumulation and poor seed quality.…”

Section: Introductionmentioning

confidence: 99%

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Seed Chlorophyll Influences Vigor in Oilseed Rape (Brassica napus L. var AC Excel.)

Onyilagha¹,

Elliott²,

Buckner³

et al. 2011

JAS

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Seeds of Brassica napus L. var AC Excel were sorted into four subsamples on the basis of the amount of chlorophyll present. Vigor of the four subsamples was studied and compared using the germination test, accelerated aging test, controlled deterioration test and electrical conductivity test. Laboratory vigor ratings were correlated with field data. Results show that seed chlorophyll had no significant effect on germination. However, seedling growth and performance were negatively affected by high chlorophyll. High chlorophyll subsamples were more sensitive to increased moisture and temperature than low chlorophyll subsamples. Additionally, seed conductivity study indicates that seed chlorophyll content is directly proportional to seed coat porosity. The usefulness of the four vigor test methods in assessing seed quality among chlorophyll seed lots of Brassica napus is also discussed.

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Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Seed Chlorophyll Influences Vigor in Oilseed Rape (Brassica napus L. var AC Excel.)

Onyilagha¹,

Elliott²,

Buckner³

et al. 2011

JAS

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“…Fluorescence occurs when some of the light absorbed by leaves and the other green organs of the plant (including seeds) is re-emitted at longer wavelength, typically between 650 and 750 nm. On the assumption that the amount of chlorophyll tends to diminish during the maturation of the seeds, the fluorescent properties of chlorophylls have been used to evaluate the maturity of cabbage seeds (Brassica oleracea L.) (Jalink, Frandas, Van der Schoor, & Bino, 1998;Jalink, Van der Schoor, Birnbaum, & Bino, 1999). A red LED (light-emitting diode, wavelength 650 nm) was used as a light source.…”

Section: Fig 1 -The Development Harvest and Processing Of Chicory Smentioning

confidence: 99%

“…The results showed that the magnitude of the chlorophyll fluorescence (CF) signal was inversely related to the quality of seeds. The relationship between the CF and germination performance was studied for tomato (Solanum lycopersicum L.) by Jalink et al (1999) as in their previous study (Jalink et al, 1998) but using a laser light source with 670 nm wavelength. They concluded that seeds with an intermediate CF level were of the best quality, followed by seeds having a low CF signal.…”

Section: Fig 1 -The Development Harvest and Processing Of Chicory Smentioning

confidence: 99%

“…Konstantinova, Van der Schoor, Van den Bulk, and Jalink (2002) measured the CF of barley grains (Hordeum υulgare L.) using the SeedScan I Laser Sorter (Satake, Stafford, TX. USA), using the principle developed by Jalink et al (1998) but using a laser light source instead of a LED. They concluded that sorting a barley seed lot into six subsamples varying in CF values resulted in an optimal quality for the subsamples with low and intermediate CF signals.…”

Section: Fig 1 -The Development Harvest and Processing Of Chicory Smentioning

confidence: 99%

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Evaluation of chicory seeds maturity by chlorophyll fluorescence imaging

Ooms

Destain

2011

Biosystems Engineering

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Chicory (Cichorium intybus L.) seed production includes sorting to remove foreign materials and non-viable seeds. A machine vision system was developed to monitor the fluorescence in order to detect the immature chicory seeds. It comprised a monochromatic light source, a highpass filter and a monochromatic CCD camera sensitive to red and infrared. With this device, blue light reflected by the seeds was blocked whilst red fluorescence was measured by the camera. A segmentation algorithm was designed to estimate separately the fluorescence intensities of the pappus, a crown of scales, and the main body of the pericarp. Experiments were carried out on five clones of cross-pollinated chicory plants used for seed production. Two hundred flower heads were labelled at flowering and harvested at different times during the maturation process expressed in "days after flowering" (DAF). Germination tests were performed according to the recommendations of the International Seed Testing Association to measure the germination percentage (GP) and the germination rate (GR), an indicator of seed vigour. Seed chlorophyll content diminished during maturation following a different logistic trend for the pappus and the pericarp. The GP increased from 18 DAF to reach its maximum value at 21 DAF, but the GR remained low until 30 DAF and increased afterwards. The potential of chlorophyll fluorescence to be used as an indicator of chicory seed vigour was the greatest between 21 and 36 DAF. The fluorescence is relative to the reflectance signal of a reference paper and multiplied by 60.

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Seed Development and Maturation

Sripathy¹,

Groot²

2023

Seed Science and Technology

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In plants, a fascinating set of post-fertilization events result in the development of a dispersal unit known as a seed. During the maturation phase, seeds accumulate storage reserves and acquire desiccation tolerance, followed by an increase in seed vigour during maturation drying. Physiological (or mass) maturity may be attributed to the stage of seed maturation when maximum seed dry matter accumulation has occurred, marking the end of the seed-filling phase. The stage of maturity at harvest is one of the most important factors that can influence the quality of seeds. Recent studies established that seed vigour and longevity continue to increase even after physiological maturity, signifying the importance of the late maturation phase for maximizing seed quality. Among the plant hormones, abscisic acid (ABA) has been studied extensively for its role during seed development and maturation. Apart from ABA, gibberellic acid (GA), cytokinin and auxin also play a critical role during the development of seeds. Desiccation tolerance in seeds begins much before the attainment of physiological maturity. Acquisition of desiccation tolerance is associated with embryo accumulation of oligosaccharides of the raffinose family, low molecular weight antioxidants, late embryogenesis abundant proteins and heat shock proteins coupled with structural changes at the cellular level. To obtain seeds of maximum quality (in terms of germination, vigour and longevity), harvesting needs to be performed at or slightly after harvest maturity a period at which seed moisture content stabilizes with environmental factors. In this chapter, an attempt has been made to present the current understanding of seed development and maturation concentrating on various aspects viz. phases of seed development, the role of plant hormones, other factors affecting seed development, concepts of seed maturity, and its relevance to seed quality, maturity indices in crop plants and acquisition of desiccation tolerance in seeds.

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Chlorophyll fluorescence of the testa of Brassica oleracea seeds as an indicator of seed maturity and seed quality

Cited by 34 publications

References 7 publications

Seed Chlorophyll Influences Vigor in Oilseed Rape (Brassica napus L. var AC Excel.)

Seed Chlorophyll Influences Vigor in Oilseed Rape (Brassica napus L. var AC Excel.)

Evaluation of chicory seeds maturity by chlorophyll fluorescence imaging

Seed Development and Maturation

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