In artificially controlled pot experiments,perennial ryegrass was mixed with other leguminous plants(white clo-ver and alfalfa)and treated with lead,zinc and cadmium(337 mg·kg^(-1),648 mg·kg^(-1),and 9 mg...In artificially controlled pot experiments,perennial ryegrass was mixed with other leguminous plants(white clo-ver and alfalfa)and treated with lead,zinc and cadmium(337 mg·kg^(-1),648 mg·kg^(-1),and 9 mg·kg^(-1),respectively)to simulate compound pollution conditions.The results showed that the concentrations of heavy metals,trans-port factors,and bioconcentration factors in mixed planting of ryegrass decreased compared with those in mono-culture.Regardless of whether heavy metal pollution was introduced,mixed planting increased the aboveground and underground biomasses of ryegrass.The different mixed planting treatments had no significant impact on the chlorophyll concentration of ryegrass.The mowing time,mixed planting treatment,and heavy metal treatment had impacts on antioxidant and osmotic adjustment substances,and there were some interactions.The mixed planting treatment did not significantly affect glutathione concentration,cysteine concentration,or nonprotein thiol.Mixed planting generally increased the nitrogen and phosphorus concentrations of ryegrass while reducing the stoichiometric ratio of carbon,nitrogen,and phosphorus.These results suggest that the mixed planting of ryegrass with legumes promotes the growth of ryegrass in the presence of high concentrations of heavy metal pollution.However,it does not enhance the ability of ryegrass to remediate heavy metal pollution in the soil.展开更多
黑麦 (Secale L .)是丰富小麦 (Triticum aestivum L .)遗传变异、选育小麦优良新品种的重要基因资源。迄今黑麦属在系统分类学、细胞遗传学、分子遗传学和小麦育种中的利用等方面的研究均已取得了令人瞩目的进展。本文主要从以上四个层...黑麦 (Secale L .)是丰富小麦 (Triticum aestivum L .)遗传变异、选育小麦优良新品种的重要基因资源。迄今黑麦属在系统分类学、细胞遗传学、分子遗传学和小麦育种中的利用等方面的研究均已取得了令人瞩目的进展。本文主要从以上四个层次 ,概述了黑麦属在分类、分布、核型带型分析、黑麦染色质的鉴定、重复序列研究、遗传图谱构建和利用黑麦改良小麦的育种实践等几个方面的最新进展。同时 ,对当前如何深入开拓和利用黑麦属基因资源进行了讨论。展开更多
基金funded through projects of the National Key Research and Development Program of China(2023YFD1301401)Cheng Wei received the grant.Ministry of Science and Technology of the People’s Republic of China(https://www.most.gov.cn/index.html,accessed on 19/03/2024)+1 种基金And the Guizhou Provincial Science and Technology Projects(QKHPTRC-CXTD[2022]1011)Chao Chen received the grant.Guizhou Provincial Department of Science and Technology(https://kjt.guizhou.gov.cn/,accessed on 19/03/2024).
文摘In artificially controlled pot experiments,perennial ryegrass was mixed with other leguminous plants(white clo-ver and alfalfa)and treated with lead,zinc and cadmium(337 mg·kg^(-1),648 mg·kg^(-1),and 9 mg·kg^(-1),respectively)to simulate compound pollution conditions.The results showed that the concentrations of heavy metals,trans-port factors,and bioconcentration factors in mixed planting of ryegrass decreased compared with those in mono-culture.Regardless of whether heavy metal pollution was introduced,mixed planting increased the aboveground and underground biomasses of ryegrass.The different mixed planting treatments had no significant impact on the chlorophyll concentration of ryegrass.The mowing time,mixed planting treatment,and heavy metal treatment had impacts on antioxidant and osmotic adjustment substances,and there were some interactions.The mixed planting treatment did not significantly affect glutathione concentration,cysteine concentration,or nonprotein thiol.Mixed planting generally increased the nitrogen and phosphorus concentrations of ryegrass while reducing the stoichiometric ratio of carbon,nitrogen,and phosphorus.These results suggest that the mixed planting of ryegrass with legumes promotes the growth of ryegrass in the presence of high concentrations of heavy metal pollution.However,it does not enhance the ability of ryegrass to remediate heavy metal pollution in the soil.
文摘黑麦 (Secale L .)是丰富小麦 (Triticum aestivum L .)遗传变异、选育小麦优良新品种的重要基因资源。迄今黑麦属在系统分类学、细胞遗传学、分子遗传学和小麦育种中的利用等方面的研究均已取得了令人瞩目的进展。本文主要从以上四个层次 ,概述了黑麦属在分类、分布、核型带型分析、黑麦染色质的鉴定、重复序列研究、遗传图谱构建和利用黑麦改良小麦的育种实践等几个方面的最新进展。同时 ,对当前如何深入开拓和利用黑麦属基因资源进行了讨论。
