Effect of alternating temperature regimes on seed germination of guar [Cyamopsis tetragonoloba (L.) Taub.]

Reis, C.M.G.; Justino, Carlos; Diogo, Maria da Graça

Publication

Effect of alternating temperature regimes on seed germination of guar [Cyamopsis tetragonoloba (L.) Taub.]

2024Journal article

dc.contributor.author	Reis, C.M.G.
dc.contributor.author	Justino, Carlos
dc.contributor.author	Diogo, Maria da Graça
dc.date.accessioned	2024-10-16T15:15:05Z
dc.date.available	2024-10-16T15:15:05Z
dc.date.issued	2024
dc.description.abstract	Guar [Cyamopsis tetragonoloba (L.) Taub.] 2n=14, is an annual crop that belongs to the Fabaceae family and has a spring–summer growth cycle. This species has been assuming increasing importance among agro-industrial crops due to the high galactomannan content of its seeds for which a multitude of food and non-food applications have been developed. Guar is a viable rotation crop for growers in Mediterranean areas and can result in diversification in crop production systems. The effects of four alternating day/night temperature regimens on C. tetragonoloba seed germination were tested: (T1) 23/15 °C, (T2) 21/13 °C, (T3) 19/ 11 °C, and (T4) 17/09 °C with a 16/08 h light/dark photoperiod, respectively. Seeds from two guar cultivars (RGC-0936 and RGC-1066) were used. Treatments consisted of four replicates of 50 seeds each, arranged in a split-plot design with temperatures as the main plot and cultivars as the subplot. The results showed that lower temperatures reduced guar seed germination. The highest germination percentages were obtained at the 21/13 °C and 23/15 °C temperature regimens, while a significant drop in germination percentage occurred for the 19/11 °C treatment, and the lowest germination percentages were observed at 17/09 °C. No statistically significant differences were found between the two cultivars studied for seed germination percentages. The interaction effects among the different alternative temperature regimes on seed germination and guar cultivars were not statistically significantly different. The values obtained at the 21/13 °C temperature treatment allow us to conclude that this regimen is the minimum acceptable combination of temperatures to program the sowing date.	pt_PT
dc.description.sponsorship	CERNAS-IPCB [UIDB/00681/2020] is funding by Portuguese Foundation for Science and Technology.	pt_PT
dc.description.version	info:eu-repo/semantics/publishedVersion	pt_PT
dc.identifier.citation	REIS, C.M.G. ; JUSTINO, C. ; Diogo, M.G. (2024) - Effect of alternating temperature regimes on seed germination of guar [Cyamopsis tetragonoloba (L.) Taub.]. Australian Journal of Crop Science. Vol. 18:9, p. 535-538. DOI: 10.21475/ajcs.24.18.09.p62	pt_PT
dc.identifier.doi	10.21475/ajcs.24.18.09.p62	pt_PT
dc.identifier.issn	1835-2707
dc.identifier.uri	http://hdl.handle.net/10400.11/9191
dc.language.iso	eng	pt_PT
dc.peerreviewed	yes	pt_PT
dc.relation.publisherversion	https://www.cropj.com/Reis_18_09_2024_535_538.pdf	pt_PT
dc.rights.uri	http://creativecommons.org/licenses/by-nc/4.0/	pt_PT
dc.subject	Cluster bean	pt_PT
dc.subject	Guar sowing	pt_PT
dc.subject	Guar cultivars	pt_PT
dc.subject	Guar cycle	pt_PT
dc.subject	Alternative crops	pt_PT
dc.title	Effect of alternating temperature regimes on seed germination of guar [Cyamopsis tetragonoloba (L.) Taub.]	pt_PT
dc.type	journal article
dspace.entity.type	Publication
oaire.citation.conferencePlace	Austrália	pt_PT
oaire.citation.endPage	538	pt_PT
oaire.citation.issue	18	pt_PT
oaire.citation.startPage	535	pt_PT
oaire.citation.title	Australian Journal of Crop Science	pt_PT
oaire.citation.volume	9	pt_PT
person.familyName	Gaspar Reis
person.givenName	Carlos
person.identifier.ciencia-id	A71B-FF9D-83C6
person.identifier.orcid	0000-0002-4854-5128
rcaap.rights	openAccess	pt_PT
rcaap.type	article	pt_PT
relation.isAuthorOfPublication	74d754d4-3926-497b-a0c4-26e98cbe0c93
relation.isAuthorOfPublication.latestForDiscovery	74d754d4-3926-497b-a0c4-26e98cbe0c93