Effects of after-ripening and storage regimens on seed-germination behavior of seven species of Physaria

Cruz, Von Mark V.; Romano, Gabriela B.; Dierig, David A.

doi:10.1016/j.indcrop.2011.06.034

Cited by 13 publications

(3 citation statements)

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“…In addition, exposing harvested seed to warm and dry conditions may result in a progressive loss of dormancy, which is commonly known as seed after-ripening, and the change in seed vigor after harvest remains largely undetermined (Baskin & Baskin 2014;Foley 2008). Studies on the effect of afterripening on promoting seed germination had have been conducted in several species, including rice (Veasey et al 2004), Stipa (Zhang et al 2017) and Physaria (Cruz et al 2012), indicating that the speed and extent of after-ripening can vary among species as well as different cultivars (Baskin & Baskin 2014;Veasey et al 2004). After-ripening of the mature seed is practically significant for plantation and seed production, but little has been revealed on the after-ripening effect on harvested seeds of sheepgrass.…”

Section: Manuscript To Be Reviewedmentioning

confidence: 99%

Peer Review #3 of "Germination characteristics among different sheepgrass (Leymus chinensis) germplasm during the seed development and after-ripening stages (v0.2)"

Chacko¹

2019

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Sheepgrass (Leymus chinensis (Trin.) Tzvel) is an important forage grass in the Eurasian steppe. However, little information is available concerning its seed morphological features and germination characteristics during seed development and after-ripening among different germplasms. To clarify the appropriate seed harvest time and the effects of germplasm, seed development and after-ripening on seed germination, 20 germplasms of sheepgrass were selected. Moreover, the seed morphological and physical changes as well as the seed germination and dormancy characteristics of sheepgrass during see d development stages were analyzed using a 7 -d gradient of day after pollination (DAP).The results indicated that the seed water content decreased significantly during 35 -42 DAP and that the highest seed germination rate of most germplasms was observed at 35 -42 DAP. Thus, 35 -42 DAP will be the best time to harvest sheepgrass to obtain the maximum seed germination rate and avoid seed shattering. Furthermore, our results indicated that there were 6 types of germination patterns, including germplasms with increasing germination rates in the developing seed, such as S19 and S13, and germplasms that maintained a consistently low germination rate, such as S10. Moreover, we compared the seed germination rate of 8 germplasms during seed development in both 2016 and 2017, and the results indicated that the seed germination patterns of the 8 germplasms were highly consistent between the two consecutive years, suggesting that germplasm rather than year is the major factor in determining germination during seed development. The effect of after-ripening on seed germination was different among the germplasms, where 4 types of germination patterns were revealed for 10 germplasms and resulted in various dormancy features. A two-factor ANOVA analysis suggested that the germplasm of the sheepgrass has a large influence on seed germination, whether during seed development or after-ripening. Thus, these findings lay the foundation for future studies on seed dormancy and germination and may guide the breeding of new cultivars of

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Section: Manuscript To Be Reviewedmentioning

confidence: 99%

Peer Review #3 of "Germination characteristics among different sheepgrass (Leymus chinensis) germplasm during the seed development and after-ripening stages (v0.2)"

Chacko¹

2019

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“…The positive effect of gibberellic acid (GA) to break seed dormancy has been determined and the effect of applying GA to seeds was found to last up to 72 months at 5 C and 35 % relative humidity [105]. GA was found to eliminate the light and temperature requirement for lesquerella seed germination in P. fendleri, P. gordonii, P. palmeri [106,107], as well as P. argyraea, P. gracilis, P. rectipes, P. recurvata, P. sessilis, and P. thamnophila [108]. GA can be applied to seeds by either soaking the seeds for 8-24 h or spraying it with a concentration of 1,000 ppm [106].…”

Section: Seed Productionmentioning

confidence: 99%

Germplasm Improvement to Develop Commercially Viable Lines of the New Oilseed Crop Lesquerella

Cruz

Dierig

2014

Handbook of Plant Breeding

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Lesquerella (Physaria fendleri) is a new oilseed crop that is being domesticated as an alternative crop for arid regions in the United States. As a member of the Brassica family, the species exhibits a high seed-oil content that can provide a source of hydroxy fatty acids for industrial use as source of bioenergy and by-products that can be utilized in livestock production. Germplasm evaluation and breeding activities on the crop have been done by the University of Arizona and the US Department of Agriculture (USDA). Lesquerella and other Physaria and Paysonia species have a substantial germplasm collection that is well characterized for phenotypic traits and oil profiles. There are several improved germplasm released by the USDA with higher oil content and seed yield, enhanced oil profile, abiotic stress tolerance, and harvest index which can be directly utilized for commercial production or used for crop improvement. Additional technologies that can aid breeding, such as molecular marker systems and genetic transformation systems, have been established. A few challenges remain to be surmounted for the crop to be commercialized. A continued concerted effort by public and private institutions may hasten the process of bringing this new crop to commercial production.

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“…In addition, exposing harvested seed to warm and dry conditions may result in a progressive loss of dormancy, which is commonly known as seed after-ripening, and the change in seed vigor after harvest remains largely undetermined (Baskin & Baskin, 2014; Foley, 2008). Studies on the effect of after-ripening on promoting seed germination had have been conducted in several species, including rice (Veasey et al, 2004), Stipa (Zhang et al, 2017), and Physaria (Cruz, Romano & Dierig, 2012), indicating that the speed and extent of after-ripening can vary among species as well as different cultivars (Baskin & Baskin, 2014; Veasey et al, 2004). After-ripening of the mature seed is practically significant for plantation and seed production, but little has been revealed on the after-ripening effect on harvested seeds of sheepgrass.…”

Section: Introductionmentioning

confidence: 99%

Germination characteristics among different sheepgrass (Leymus chinensis) germplasm during the seed development and after-ripening stages

Yang

Liu

Yuan

et al. 2019

PeerJ

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Sheepgrass (Leymus chinensis (Trin.) Tzvel) is an important forage grass in the Eurasian steppe. However, little information is available concerning its seed morphological features and germination characteristics during seed development and after-ripening among different germplasm. To clarify the appropriate seed harvest time and the effects of germplasm, seed development and after-ripening on seed germination, 20 germplasm of sheepgrass were selected. Moreover, the seed morphological and physical changes as well as the seed germination and dormancy characteristics of sheepgrass during seed development stages were analyzed using a seven—d gradient of day after pollination (DAP). The results indicated that the seed water content decreased significantly during 35–42 DAP and that the highest seed germination rate of most germplasm was observed at 35–42 DAP. Thus, 35–42 DAP may be the best time to harvest sheepgrass to obtain the maximum seed germination rate and avoid seed shattering. Furthermore, our results indicated that there were six types of germination patterns, including germplasm with increasing germination rates in the developing seed, such as S19 and S13, and germplasm that maintained a consistently low germination rate, such as S10. Moreover, we compared the seed germination rate of eight germplasm during seed development in both 2016 and 2017, and the results indicated that the seed germination patterns of the eight germplasm were highly consistent between the two consecutive years, suggesting that germplasm rather than year is the major factor in determining germination during seed development. The effect of after-ripening on seed germination was different among the germplasm where four types of germination patterns were revealed for 10 germplasm and resulted in various dormancy features. A two-factor ANOVA analysis suggested that the germplasm of the sheepgrass has a large influence on seed germination, whether during seed development or after-ripening. Thus, these findings lay the foundation for future studies on seed dormancy and germination and may guide the breeding of new cultivars of sheepgrass with better germination performance.

show abstract

Effects of after-ripening and storage regimens on seed-germination behavior of seven species of Physaria

Cited by 13 publications

References 18 publications

Peer Review #3 of "Germination characteristics among different sheepgrass (Leymus chinensis) germplasm during the seed development and after-ripening stages (v0.2)"

Peer Review #3 of "Germination characteristics among different sheepgrass (Leymus chinensis) germplasm during the seed development and after-ripening stages (v0.2)"

Germplasm Improvement to Develop Commercially Viable Lines of the New Oilseed Crop Lesquerella

Germination characteristics among different sheepgrass (Leymus chinensis) germplasm during the seed development and after-ripening stages

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