Physiological and Harvest Maturity of Canola in Relation to Seed Quality

Elias, Sabry G.; Copeland, Lawrence O.

doi:10.2134/agronj2001.9351054x

Cited by 72 publications

(52 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…DASGUPTA and MANDAL (1993) divided seed development in oilseed mustard (Brassica campestris) into three stages; embryo cell division and differentiation, rapid accumulation of storage materials and dehydration. Similar stages were also reported for Brassica napus (CROUCH, SUSSOX 1981;ELIAS, COPELAND 2001;BECCACOUI, WILF 2003). REN and BEWLEY (1998) divided seed development of Chinese cabbage (Brassica rapa subsp.…”

Section: Germination (%)supporting

confidence: 83%

Seed development stages of kale (Brassica oleracea var. acephala L.) genotypes in Turkey

Demir¹,

Balkaya²

2005

Hort. Sci. (Prague)

View full text Add to dashboard Cite

This research determined the stages of kale (Brassica oleracea var. acephala L.) seed development in Samsun province, Turkey, between 2002 and2003. Plants of inbred kale lines (55TE07, 55TK09, 52PE09, 61ÇY01 and 67DE01) were grown. On the basis of seed and embryo colour, seed morphology (seed length, seed width and embryo length), seed development can be divided into 7 discrete but contiguous stages. The germination rate of inbred lines was at its maximum, or near to its maximum, until the seed moisture declined to 50%. Germination rates reached a maximum level at 65 days after pollination (DAP). It was concluded that kale seeds should be harvested when pods became brown in stage 7 (65 DAP). This study will be used for comparisons with seed development in other Brassica species. kale. The identification of distinct morphological and physiological characteristics is an important initial step in the study of seed development in a species. Hence for researchers to be able to compare data on seed development, reference points other than time after pollination are essential (REN, BEWLEY 1998). As a prelude to the study of kale seeds, it was necessary to identify the distinct morphological characteristics of each stage and to define the stages of seed development chronologically. MATERIAL AND METHODS Plant husbandry and seed harvestThis research was carried out in the field and in the laboratory of the Department of Horticulture, Faculty of Agriculture, Ondokuz Mayis University, from September 2002 to October 2003. There are no registered kale varieties in Turkey (ANONYMOUS 2004). Therefore, local kale populations are commonly used in kale production (Fig. 1). For this reason, plants of inbred kale lines (55TE07, 55TK09, 52PE09, 61ÇY01 and 67DE01) developed by the breeding studies of BALKAYA et al. (2001) were used in this research.Seeds were sown in seedling trays on 5 September 2002 and seedlings were transplanted on October 10 when they reached the stage of 4-5 expanded leaves. Plant spacing was 40 cm between rows and 30 cm within rows. Standard fertilization and weed control practices were used.Inbred lines (8 plants) were cultivated in an isolation cage. The plants began flowering in April-May. Each genotype was openpollinated under isolation. Although the selected inbred lines required the same length of time to complete the various stages of seed development, there were some variations among seeds on the same plant or even within a single silique. Siliques were harvested at intervals of 3 days after anthesis. Thus, seeds at different development stages were collected at intervals of 3 days, according to their DAP and then selected by their colour and size, according to staging standards. Measurement of the physical characteristics of seeds and embryosDeveloping seeds at different stages were collected and the characteristics of representative seeds and embryos were described. The siliques used to determine the seed characteristics were immersed in an FAA solution prepared with 20 cc formaldehyde, 25 c...

show abstract

Section: Germination (%)supporting

confidence: 83%

Seed development stages of kale (Brassica oleracea var. acephala L.) genotypes in Turkey

Demir¹,

Balkaya²

2005

Hort. Sci. (Prague)

View full text Add to dashboard Cite

show abstract

“…in addition, seed coat colour variation within a species was reported to be associated with harvesting seeds at different developmental stages (Elias, & Copeland, 2001;Atis, Atak, Can, & Mavi, 2011). Consequently, seed colour could be an important indicator of maturity.…”

Section: Discussionmentioning

confidence: 99%

Seed colour affects light and temperature requirements during germination in two Lotus species (Fabaceae) of the Arabian subtropical deserts

Bhatt¹,

Gairola²,

El‐Keblawy³

2016

RBT

View full text Add to dashboard Cite

Heterogeneity in seeds mostly occurs due to physiological, environmental and genetic factors, and these could affect seed dormancy and germination. Therefore, the aim of our study was to assess the effect of seed colour on germination behavior. For this, both light and temperature requirements were assessed in Lotus glinoides and Lotus halophilus (Fabaceae) from the hyper-arid deserts of the United Arab Emirates. Germination was assessed in terms of both final germination level (percentage) and germination rate, as expressed by Timson's germination velocity index. Lotus glinoides produces black and yellow-colored seeds, and L. halophilus produces green and yellow seeds. Different seed lots were germinated in both light and darkness at different temperatures. Yellow seeds of the two species attained significantly lower germination, compared to black and green seeds. There was no specific light or temperature requirements for the germination of the two coloured seeds of L. glinoides; the effect of interactions between seed colour and both light and incubation temperature, were not significant on the final germination percentage. in L. halophilus, green seeds germinated significantly more in both light and darkness at lower temperatures (15/25 °C) and in light at higher temperatures (25/35 °C), compared to yellow seeds. Yellow seeds germinated faster, compared to black at 15/25 °C in L. glinoides and compared to green seeds at 15/25 °C and 25/35 °C in L. halophilus. Seed colour variation, at least in L. halophilus, could be a survival strategy that would determine the time of germination throughout the year in the unpredictable desert environment. Rev. Biol. Trop. 64 (2): 483-492. Epub 2016 June 01.

show abstract

“…During the last 50 years morphological scales of developmental stages or external changes of some reproductive organs in crop plants have been developed. For example, phenological scales have been developed for maize (Hanway, 1963;Hunter et al, 1991;Ritchie et al, 1992), soybean (Fehr et al, 1971;Gbikpi & Crookston, 1981), and rapeseed (Elías & Copeland, 2001;Sabry & Copeland, 2001).…”

Section: Introductionmentioning

confidence: 99%

Visual definition of physiological maturity in sunflower (Helianthus annuus L.) is associated with receptacle quantitative color parameters

Hernández

Larsen²

2013

Span. j. agric. res.

View full text Add to dashboard Cite

Identifying physiological maturity (PM) in sunflower (Helianthus annuus L.) by visual methods is subjective. The present study was conducted during two years in two short season sunflower hybrids (Macón and MG60) to determine the relationship between quantitative color parameters in the receptacle and physiological markers such as fruit dry weight (FDW) and fruit water content (FWC) from flowering to PM. Fruits from the external 25% of the capitulum radius were sampled at 3-5-day intervals from first anthesis until harvest maturity. Fruit and receptacle fresh and dry weight were calculated, and color changes of the receptacle base were followed over time using a spectrophotometer. Comparison of colorimetric coordinates a* and b*, defined by the CIELAB color space enabled quantitative correlation of color changes in the receptacle with the maturation stage of the fruits and their moisture content. In both hybrids and years, fruits attained maximum dry weight when the receptacle color turned from dark green to buttery-yellow. Strong correlations were found between FWC and a* for Macón the first (r = -0.877) and second year (r = -0.934) and for MG60, (r = -0.912 and r = -0.891) the first and second year, respectively. The same results were found for b* for Macón (r = -0.901 and r = -0.829) and for MG60 (r = -0.898 and r = -0.863) for the first and second year respectively. Maximum b* at FWC between 40 to 41% had the highest correlation with maximum fruit dry weight for both hybrids and years, and was a good indicator for identifying the attainment of PM. This work represents an original contribution and a first step towards the development of a model for predicting PM in sunflower by using colorimetric measurements.

show abstract

Physiological and Harvest Maturity of Canola in Relation to Seed Quality

Cited by 72 publications

References 11 publications

Seed development stages of kale (Brassica oleracea var. acephala L.) genotypes in Turkey

Seed development stages of kale (Brassica oleracea var. acephala L.) genotypes in Turkey

Seed colour affects light and temperature requirements during germination in two Lotus species (Fabaceae) of the Arabian subtropical deserts

Visual definition of physiological maturity in sunflower (Helianthus annuus L.) is associated with receptacle quantitative color parameters

Contact Info

Product

Resources

About