Elevated and super-elevated CO2 differ in their interactive effects with nitrogen availability on fruit yield and quality of cucumber
Elevated and super-elevated CO2 differ in their interactive effects with nitrogen availability on fruit yield and quality of cucumber
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DOI：
10.1002/jsfa.8976
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发表时间：
2018-09-01
影响因子：
4.1
通讯作者：
Duan, Zengqiang
中科院分区：
文献类型：
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作者：
Dong, Jinlong;Xu, Qiao;Duan, Zengqiang
背景：提高二氧化碳(CO2)和氮素(N)的有效性可以交互促进黄瓜产量，但其增产机理尚不清楚，对果实品质的交互作用也不清楚。在本研究中，黄瓜植株(Cucumis sativus L.cv.结果：在水稻土中，400(环境CO2)、800(高浓度CO2，ECO(2))和1200亩摩尔摩尔(-1)(超高CO2)和两种施氮量(0.06(低N)和0.24g N kg(-1))土壤(高N)条件下，ECO(2)增产106%，总生物量仅增加33%。这可能是由于更多的碳从其他器官转移到果实中，从茎和叶，特别是源叶到果实的生物量分配增加，以及源叶中果糖和葡萄糖浓度的降低。二氧化碳超标减少了果实的碳分配，从而增加了产量(71%)。此外，ECO(2)还增加了果实中果糖和葡萄糖的含量，维持了膳食纤维、磷、钾、钙、镁、硫、锰、铜、钼和钠的含量，同时降低了高氮条件下的硝酸盐、蛋白质、铁和锌的浓度。与ECO(2)相比，超高CO2处理在低氮条件下仍能在一定程度上改善果实品质。除了稀释效应外，果实的碳分配、碳水化合物的转化以及养分的吸收和同化都会影响果实的品质。(三)2018年化学工业学会
BACKGROUND: Elevated carbon dioxide (CO2) and nitrogen (N) availability can interactively promote cucumber yield, but how the yield increase is realized remains unclear, whilst the interactive effects on fruit quality are unknown. In this study, cucumber plants (Cucumis sativus L. cv. Jinmei No. 3) were grown in a paddy soil under three CO(2 )concentrations - 400 (ambient CO2), 800 (elevated CO2, eCO(2)) and 1200 mu mol mol(-1) (super-elevated CO2) - and two N applications - 0.06 (low N) and 0.24g N kg(-1) soil (high N).RESULTS: Compared with ambient CO2, eCO(2) increased yield by 106% in high N but the increase in total biomass was only 33%. This can result from greater carbon translocation to fruits from other organs, indicated by the increased biomass allocation from stems and leaves, particularly source leaves, to fruits and the decreased concentrations of fructose and glucose in source leaves. Super-elevated CO2 reduced the carbon allocation to fruits thus yield increase (71%). Additionally, eCO(2) also increased the concentrations of fructose and glucose in fruits, maintained the concentrations of dietary fiber, phosphorus, potassium, calcium, magnesium, sulfur, manganese, copper, molybdenum and sodium, whilst it decreased the concentrations of nitrate, protein, iron, and zinc in high N. Compared with eCO(2), super-elevated CO2, can still improve the fruit quality to some extent in low N availability.CONCLUSIONS: Elevated CO2 promotes cucumber yield largely by carbon allocation from source leaves to fruits in high N availability. Besides a dilution effect, carbon allocation to fruits, carbohydrate transformation, and nutrient uptake and assimilation can affect the fruit quality. (C) 2018 Society of Chemical Industry