Screening of kenaf (Hibiscus cannabinus L.) genotypes for low temperature requirements during germination and evaluation of feasibility of seed production in Italy

Macchia, Mario; Ceccarini, Lucia; Bonari, E.

doi:10.1016/s0378-4290(98)00111-7

Cited by 10 publications

(8 citation statements)

References 13 publications

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“…Germination and seedling development in kenaf are, however, critical phases and the duration of these phases is a function of only temperature (Angelini et al 1998), if water is not a limiting factor (Mosley and Baldwin 1999).…”

Section: Seed Germinationmentioning

confidence: 99%

“…Following Carberry and Abrecht (1990) findings, a study on kenaf germination was carried out in central Italy with the aim to assess cultivars suitable to early sowings and resistant to cold in the early stages of growth (Angelini et al 1998). Fifteen kenaf lines and cultivars selected for tolerance to low temperatures were compared to cv.…”

Section: Seed Germinationmentioning

confidence: 99%

“…According to its sensitivity to daylength, kenaf is classified as a short-day plant, even though cultivars, either early or late-maturing, differ markedly in their response to daylength (Angelini et al 1998). Patanè and Sortino (2010) reported that there is a strong daylength control on floral initiation of kenaf.…”

Section: Introductionmentioning

confidence: 99%

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Crop Physiology in Relation to Agronomic Management Practices

Scordia

Testa

Cosentino

2013

Kenaf: A Multi-Purpose Crop for Several Industrial Applications

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This chapter describes the physiology of kenaf from seed germination and root development till the effects of water and nutrients stress on grown plants. Review on kenaf agro-physiology of experiments carried out worldwide are presented and discussed mainly at the canopy and whole-plant level with the aim to help producers to make decisions and planning of production. However, few literature reports experimental results on the physiology of this multipurpose crop especially in terms of assimilation rate and its relation with environmental and agronomic factors. Knowledge on gas exchange rate and stomatal conductance may be a key support in understanding the physiology of Kenaf in terms of water requirements, its ability of light conversion into carbonaceous molecules influencing crop production potential and, indirectly, the carbon sequestration activity. In kenaf seedling development takes place when temperatures are higher than 10 °C, supporting the idea that kenaf is a macrothermal plant and optimal sowing has to be carried out during springsummer, depending on the area of cultivation. Kenaf is very sensitive to reduced soil water availability, however, under moderate water stress conditions the crop maintains root development while reducing final biomass yield. Recent studies from Greece and Italy showed that even though kenaf uses CO 2 , solar radiation, water, and nitrogen less efficiently than C 4 crops its assimilation rates can reach 50-58 kg of CO 2 ha −1 h −1 . However, great differences in terms of net photosynthesis have been reported by various authors, which may be related to the different environmental variables and agronomic managements during field and controlled experimental environments, such as air temperature, light intensity, water supply, nutrients availability, relative humidity, wind, cultivar, plant density, and soil type. Similar results were reported in the literature regarding stomatal conductance and transpiration rates. In experiments carried out during the night, stomatal conductance and transpiration rate determined

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Section: Seed Germinationmentioning

confidence: 99%

Section: Seed Germinationmentioning

confidence: 99%

See 1 more Smart Citation

Crop Physiology in Relation to Agronomic Management Practices

Scordia

Testa

Cosentino

2013

Kenaf: A Multi-Purpose Crop for Several Industrial Applications

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“…Late maturing varieties are generally better yielding compared to the early ones, due to their longer vegetative phases (Petrini et al, 1994;Alexopoulou et al, 2000). Among the latematurity varieties, Tainung 2 and Everglades 41 were found quite promising (Alexopoulou et al, 2000;Angelini et al, 1998), with maximum total dry matter production of 20-24 t ha -1 (Alexopoulou et al, 2000).…”

Section: Introductionmentioning

confidence: 98%

“…2). The adoption of genotypes able to germinate at temperatures of 8-10 °C (Carberry and Abrecht, 1990;Angelini et al, 1998) and the breeding of new ones retaining this trait may, therefore, be seen as a key tool to lengthen crop cycle and improve yields.…”

mentioning

confidence: 99%

Effects of Plant Density, Seeding and Harvest Time on the Growth of Two Kenaf (Hibiscus Cannabinus L.) Varieties

Barbanti¹,

Virgilio²,

Venturi³

2008

Ital J Agronomy

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Kenaf is an annual C 3 multipurpose crop for the fibre and energy industry, whose growth has been widely investigated in the tropics, but not at relatively-high latitudes. This work aimed at evaluating the effects of two genotypes (Tainung 2 and Everglades 41), two plant densities (20 and 40 plants m -2 ), two seeding times (S1 and S2) and two harvest times (H1 and H2) on growth and its relations with climatic factors over three years (2003)(2004)(2005) in Northern Italy (c. 45°N). Fitting curves for whole-plant dry biomass (DB) and dry stems (DS) on heat sums always gave a reliable description of the growth pattern along the season, explaining over 90% of the total variation. In general, the best-fitting models were the sigmoid and the exponential one for DB and DS, respectively. Among the four studied factors, only seeding time originated consistent growth differences among years, whereas the two varieties showed an equivalent behaviour, as well as the two densities. Furthermore, the thinner density allowed savings in the cost of seed at no prejudice for yield potential. S1 in general showed higher asymptotic yields than S2 in 2003 and 2004, while S2 consistently grew faster than S1 in all the three years. RUE showed a generally low value (e.g., 1.35 g MJ -1 for DB in S1), indicating a moisture constraint on crop growth, especially in the first year. As for the correlations, three traits, plant height, base stem diameter and fresh biomass, resulted significantly associated to DB and DS, with correlation coefficients (r) ranging from 0.65 to 0.90; a higher degree of association with DB and DS was achieved by the multiple linear regressions of the same three traits (adj. R 2 of about 0.85). A high dependence of DB and especially of DS on associated heat and rain (adj. R 2 0.76 and 0.86, respectively) was also observed in the variable environmental conditions among the three years, which attributes a non-negligible power of prediction to the two environmental parameters. These results offer the opportunity of estimating growth through the measure of non-destructive crop variables of easier assessment, and encourages their adoption, in association with that of simple climatic factors (temperatures, precipitation) as tools of potential support to facilitate biomass assessments in commercial fields.

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