Seed survival of four tropical tree species in response to environment

Lima, Mdjvj; Ellis, R. H.

doi:10.15258/sst.2005.33.1.16

Cited by 4 publications

(2 citation statements)

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“…Our derived C W value of 4.498 for pepper seeds is close to those for crop seeds that have similar oil contents such as soybean, which has C W = 3.979 and 17% oil content (Ellis et al, 1982). On the contrary, more recent work in tree seeds showed that there were poor correlations (P > 0.05) among seed oil content, C W , and longevity (de Lima and Ellis, 2005). Such insignificant correlation indicates that a generalization regarding differences in seed longevity among orthodox species in relation to oil content is not possible.…”

Section: Discussionsupporting

confidence: 74%

Derivation of Constants (KE, CW) for the Viability Equation for Pepper Seeds and the Subsequent Test of Its Applicability

Demir¹,

Kenanoğlu²,

Mavi³

et al. 2009

horts

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The effect of moisture on seed longevity during experimental storage was investigated in pepper (Capsicum annuum) cultivar Demre. Seeds were stored hermetically at 7.0%, 8.6%, 9.5%, 10.5%, and 12.1% moisture content (MC; percent fresh weight basis) and 35 °C for up to 306 d. Viability (normal germination) was assessed periodically and the seed viability equation moisture constants, KE and CW, estimated by regression of log σ (the sd of distribution of seed death in time) with log MC. KE and CW values were found to be 7.767 and 4.670, respectively. The newly found moisture constants were combined with the temperature constants that had already been proposed as universal for all orthodox seeds (CH = 0.0329, CQ = 0.000478) and their validity was tested by predicting the viability loss in another pepper cultivar, Carliston. The Ki of the Carliston cultivar was determined by controlled deterioration at 40 °C and 14% MC. The observed viability loss between 30 and 270 d at 25 °C and 10% seed MC was closely related to that predicted by the equation R2 = 0.982 (P < 0.001).

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Section: Discussionsupporting

confidence: 74%

Derivation of Constants (KE, CW) for the Viability Equation for Pepper Seeds and the Subsequent Test of Its Applicability

Demir¹,

Kenanoğlu²,

Mavi³

et al. 2009

horts

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show abstract

“…For Nothofagus, estimates of C W , which quantify the relative sensitivity of seed longevity to moisture content, are higher than those obtained for some other tree species (Tompsett, 1986;Bonner, 1994;Tompsett and Kemp, 1996;Medeiros et al, 1998;Lima and Ellis, 2005). Nevertheless, the suspicion that tree seed longevity is less sensitive to moisture than that of herbaceous species (Tompsett, 1994;Hong and Ellis, 1996) is supported by a re-analysis of the current results, where a negative semi-logarithmic relation between equilibrium relative humidity and longevity [equation (3), Fig.…”

Section: Discussionmentioning

confidence: 86%

Seed survival in Chilean Nothofagus in response to desiccation and storage

León‐Lobos

Ellis

2005

Seed Sci. Res.

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Nothofagus alpina, N. obliqua, N. glauca, N. leonii, N. dombeyi and N. pumilio seeds exhibited consistent, albeit slight, sensitivity to extreme desiccation, but nevertheless maintained viability at low moisture contents and cool temperatures (2 108 to 2 208C) over 2 years. Nothofagus alpina, N. obliqua, N. glauca, N. leonii and N. dombeyi conformed to the seed viability equation of Ellis and Roberts; sensitivity of longevity to temperature was quantitatively similar to that of crop seeds, sensitivity to moisture was somewhat less, and a low-moisture-content limit to the equation was detected at 4.8% moisture content in hermetic storage at 65 8C, and possibly similar moisture contents at 30 -408C. These five species show orthodox seed storage behaviour. Therefore, ex-situ conservation of these Nothofagus species in seed banks is possible, but the quality of seed lots collected requires attention. Seed storage behaviour was not defined in N. pumilio: initial seed quality was poor and loss of viability was detected over 2 years at 08, 2108 and 2 208C at 2.7% moisture content, but not at 5.2%. The results confirm that the economy of nature in seed storage physiology extends to forest tree seeds, but the repeated observation of reduced sensitivity of longevity to moisture in forest tree seeds requires further investigation.

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Effect of water content and temperature on seed longevity of seven Brassicaceae species after 5 years of storage

2014

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Maximising seed longevity is crucial for genetic resource preservation and longevity of orthodox seeds is determined by environmental conditions (water content and temperature). The effect of water content (down to 0.01 g·H₂O·g(-1) ) on seed viability was studied at different temperatures for a 5-year storage period in taxonomically related species. Seeds of seven Brassicaceae species (Brassica repanda, Eruca vesicaria, Malcolmia littorea, Moricandia arvensis, Rorippa nasturtium-aquaticum, Sinapis alba, Sisymbrium runcinatum) were stored at 48 environments comprising a combination of eight water contents, from 0.21 to 0.01 g·H₂O·g(-1) DW and six temperatures (45, 35, 20, 5, -25, -170 °C). Survival curves were modelled and P50 calculated for those conditions where germination was reduced over the 5-year assay period. Critical water content for storage of seeds of six species at 45 °C ranged from 0.02 to 0.03 g·H₂O·g(-1) . The effect of extreme desiccation at 45 °C showed variability among species: three species showed damaging effects of drying below the critical water content, while for three species it was neither detrimental nor beneficial to seed longevity. Lipid content could be related to longevity, depending on the storage conditions. A variable seed longevity response to water content among taxonomically related species was found. The relative position of some of the species as long- or short-lived at 45 °C varied depending on the humidity at which storage behaviour was evaluated. Therefore, predictions of survival under desiccated conditions based on results obtained at high humidity might be problematic for some species.

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Seed survival of four tropical tree species in response to environment

Cited by 4 publications

References 0 publications

Derivation of Constants (KE, CW) for the Viability Equation for Pepper Seeds and the Subsequent Test of Its Applicability

Derivation of Constants (KE, CW) for the Viability Equation for Pepper Seeds and the Subsequent Test of Its Applicability

Seed survival in Chilean Nothofagus in response to desiccation and storage

Effect of water content and temperature on seed longevity of seven Brassicaceae species after 5 years of storage

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