Abstract
Due to its proposed potential role in reducing risk of cardiovascular disease and some forms of cancer, flavonol level in plants is an important trait. In this study, nine Welsh onion cultivars were grown in 2006 in Jinan, and six cultivars were grown in 2007 in Qingdao to study the distribution of quercetin (a flavonol) among different tissues of the Welsh onion. After harvest, quercetin levels in leaves, upper pseudo stems, and inner and outer rings of lower pseudo stems were measured for each cultivar. Large variations in quercetin levels were observed among cultivars. ‘Jilin Xiao Cong’, a local cultivar of Northern China, had significantly higher quercetin levels in pseudo stems (about 4 times) than the other cultivars in the Jinan trial (P < 0.05). Leaves of ‘Zhangqiu Da Cong’ and ‘Shi Guo Yi Ben Tai’ had higher quercetin levels than those of the other four cultivars in the Qingdao trial (P < 0.05). Leaves contained significantly higher amounts of quercetin than pseudo stems (P < 0.05). The inner core tissues of pseudo stems had significantly higher levels of quercetin than the outer rings (P < 0.05). The results indicated that intake more leaves of Welsh onion may contribute a significant amount of flavonoids to one’s diet and health benefits. The results of this experiment are useful for plant breeders who are interested in improving this trait in Welsh onion. Key words: Allium fistulosum L., Welsh onion, flavonols, quercetin, variation, spectrophotometry.
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Claims 6
Claim · model-written summary
Quercetin levels varied widely among Welsh onion cultivars.
- Taxon
- Welsh onion (Allium fistulosum L.)
Allium fistulosumt0 - Outcome
- quercetin levelse0
- Direction
- Large variationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Large variations in quercetin levels were observed among cultivars.”
t0“Welsh onion (Allium fistulosum L.)”
Claim · model-written summary
Jilin Xiao Cong had about fourfold higher pseudo stem quercetin than other cultivars in Jinan.
- Taxon
- Welsh onion (Allium fistulosum L.)Allium fistulosumt0
- Material
- Jilin Xiao Conge0
- Organ / stage
- pseudo stemse0
- Outcome
- quercetin levelse0
- Direction
- highere0
- Value
- about 4 timese0
- Comparator
- the other cultivarse0
- Setting
- Jinane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Jilin Xiao Cong’, a local cultivar of Northern China, had significantly higher quercetin levels in pseudo stems (about 4 times) than the other cultivars in the Jinan trial (P < 0.05).”
t0“Welsh onion (Allium fistulosum L.)”
Claim · model-written summary
Leaves of Zhangqiu Da Cong had higher quercetin than the other four cultivars in Qingdao.
- Taxon
- Welsh onion (Allium fistulosum L.)Allium fistulosumt0
- Material
- Zhangqiu Da Conge0
- Organ / stage
- Leavese0
- Outcome
- quercetin levelse0
- Direction
- highere0
- Comparator
- the other four cultivarse0
- Setting
- Qingdaoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves of ‘Zhangqiu Da Cong’ and ‘Shi Guo Yi Ben Tai’ had higher quercetin levels than those of the other four cultivars in the Qingdao trial (P < 0.05).”
t0“Welsh onion (Allium fistulosum L.)”
Claim · model-written summary
Leaves of Shi Guo Yi Ben Tai had higher quercetin than the other four cultivars in Qingdao.
- Taxon
- Welsh onion (Allium fistulosum L.)Allium fistulosumt0
- Material
- Shi Guo Yi Ben Taie0
- Organ / stage
- Leavese0
- Outcome
- quercetin levelse0
- Direction
- highere0
- Comparator
- the other four cultivarse0
- Setting
- Qingdaoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves of ‘Zhangqiu Da Cong’ and ‘Shi Guo Yi Ben Tai’ had higher quercetin levels than those of the other four cultivars in the Qingdao trial (P < 0.05).”
t0“Welsh onion (Allium fistulosum L.)”
Claim · model-written summary
Leaves contained more quercetin than pseudo stems.
- Taxon
- Welsh onion (Allium fistulosum L.)Allium fistulosumt0
- Organ / stage
- Leavese0
- Outcome
- amounts of quercetine0
- Direction
- highere0
- Comparator
- pseudo stemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves contained significantly higher amounts of quercetin than pseudo stems (P < 0.05).”
t0“Welsh onion (Allium fistulosum L.)”
Claim · model-written summary
Inner core pseudo stem tissues contained more quercetin than outer rings.
- Taxon
- Welsh onion (Allium fistulosum L.)Allium fistulosumt0
- Organ / stage
- inner core tissues of pseudo stemse0
- Outcome
- levels of quercetine0
- Direction
- highere0
- Comparator
- the outer ringse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inner core tissues of pseudo stems had significantly higher levels of quercetin than the outer rings (P < 0.05).”
t0“Welsh onion (Allium fistulosum L.)”