http://www.cnr.it/ontology/cnr/individuo/prodotto/ID51722
Germination and radicle growth in unprimed and primed seeds of sweet sorghum as affected by reduced water potential in NaCl at different temperatures (Articolo in rivista)
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- Germination and radicle growth in unprimed and primed seeds of sweet sorghum as affected by reduced water potential in NaCl at different temperatures (Articolo in rivista) (literal)
- Anno
- 2009-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.indcrop.2008.12.005 (literal)
- Alternative label
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- Patanè C.; Cavallaro V.; Cosentino S.L. (literal)
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- Impact factor 2010 rivista: 2.507
n. citazioni: 8 (literal)
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- doi:10.1016/j.indcrop.2008.12.005 (literal)
- Note
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Patanè C., CNR-Istituto per i Sistemi Agricoli e Forestali del Mediterraneo (ISAFoM), Sede di Catania, Str.le V. Lancia, Zona Industriale, Blocco Palma 1, 95121 Catania, Italy.
Cavallaro V., CNR-Istituto per i Sistemi Agricoli e Forestali del Mediterraneo (ISAFoM), Sede di Catania, Str.le V. Lancia, Zona Industriale, Blocco Palma 1, 95121 Catania, Italy.
Cosentino S.L., Dipartimento di Scienze delle Produzioni Agrarie e Alimentari (DISPA), Università degli Studi di Catania, Via Valdisavoia 5, 95123 Catania, Italy (literal)
- Titolo
- Germination and radicle growth in unprimed and primed seeds of sweet sorghum as affected by reduced water potential in NaCl at different temperatures (literal)
- Abstract
- The effects of reduced water potential ( ) in NaCl and pre-osmopriming in PEG, on seed germination
and early radicle growth at different temperatures were assessed in the laboratory for sweet sorghum
[Sorghum bicolor (L.) Moench] cv. Roce. Five salt solutions (with a of 0-control, -0.22, -0.42, -0.82 or
-1.23MPa) and four temperatures of 10, 15, 25 or 35 oC were used for germination tests. Daily and final
germination, seed moisture at 4 and 24 h of imbibition and radicle length 2 days after initial germination
were recorded. Sorghum seeds seem to be more tolerant to reduced at optimum temperature. Indeed,
at 25 oC, downto-0.82MPa seed germinationwas not affected. The increase in incubation temperature to
35 oC determined a greater seedwater content and a faster germination than at 25 oC at all s, despite the
lower final germination percentage. With the lowering of temperature to 15 oC, germination percentage
significantly declined with the decrease of and at -0.82MPa it reduced to less than 50%. At 10 oC
seeds failed to germinate at <-0.22MPa due to combined depressive effects of reduced and low
temperature. Seed priming enhanced germination and shortened the delay in germination time due to
the increase in saline stress, at suboptimal temperatures only. This effect could be explained by the faster
water absorption occurring in primed seeds as compared to those unprimed, at these temperatures,
regardless of salt concentration of the solution.
Root growth was more sensitive than germination to salt stress. Indeed, the increase in NaCl concentration
adversely affected root elongation at all temperatures. The beneficial effects of PEG-osmopriming
were evident on root growth at all temperatures except the optimal one.
From a practical point of view, when early sowings of sweet sorghum are requested, the use of primed
seeds is suggested, as PEG-osmopriming is helpful in overcoming the negative effect imposed by reduced
water potential upon seed germination under suboptimal thermal conditions. When salinewater is available
for irrigation at sowing, it may be useful to sow when optimal or nearly optimal temperature may
be encountered in the soil in order to avoid the combined stress of temperature and salinity. (literal)
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