华北农学报
華北農學報
화북농학보
ACTA AGRICULTURAE BOREALI-SINICA
2014年
5期
186-192
,共7页
甜瓜%嫁接%铜胁迫%光合特性%矿质元素
甜瓜%嫁接%銅脅迫%光閤特性%礦質元素
첨과%가접%동협박%광합특성%광질원소
Melon%Grafting%Copper stress%Photosynthetic characteristics%Mineral elements
为探索嫁接对铜胁迫下甜瓜幼苗光合特性与矿质元素吸收的影响，选择了南瓜京欣砧三号为砧木，薄皮甜瓜IVF09与厚皮甜瓜IVF117为接穗，以自根苗为对照，采用基质栽培法研究了铜胁迫下甜瓜嫁接苗和自根苗的光合特性与矿质元素吸收。结果表明：在铜胁迫条件下，甜瓜幼苗生物量下降、光合作用受抑制、矿质元素吸收平衡破坏。但在同一胁迫条件下，嫁接苗的生物量大于自根苗，光合色素含量高于自根苗，净光合速率（ Pn）、蒸腾速率（ Tr）、气孔导度（Gs）、胞间CO2浓度（Ci）显著大于自根苗，气孔限制值（Ls）小于自根苗；嫁接改善了矿质元素吸收，有效增加K、P、Na等的含量，减少Cu含量，IVF09嫁接苗叶片Cu含量在800μmol/L Cu2＋胁迫下显著低于自根苗，仅为自根苗的70．11％；而IVF117在400μmol/L Cu2＋胁迫下Cu含量显著低于自根苗，为自根苗的86．61％。因此，嫁接减弱了铜胁迫对甜瓜幼苗光合特性与矿质元素吸收的抑制作用，缓解了铜胁迫对甜瓜幼苗的毒害作用。
為探索嫁接對銅脅迫下甜瓜幼苗光閤特性與礦質元素吸收的影響，選擇瞭南瓜京訢砧三號為砧木，薄皮甜瓜IVF09與厚皮甜瓜IVF117為接穗，以自根苗為對照，採用基質栽培法研究瞭銅脅迫下甜瓜嫁接苗和自根苗的光閤特性與礦質元素吸收。結果錶明：在銅脅迫條件下，甜瓜幼苗生物量下降、光閤作用受抑製、礦質元素吸收平衡破壞。但在同一脅迫條件下，嫁接苗的生物量大于自根苗，光閤色素含量高于自根苗，淨光閤速率（ Pn）、蒸騰速率（ Tr）、氣孔導度（Gs）、胞間CO2濃度（Ci）顯著大于自根苗，氣孔限製值（Ls）小于自根苗；嫁接改善瞭礦質元素吸收，有效增加K、P、Na等的含量，減少Cu含量，IVF09嫁接苗葉片Cu含量在800μmol/L Cu2＋脅迫下顯著低于自根苗，僅為自根苗的70．11％；而IVF117在400μmol/L Cu2＋脅迫下Cu含量顯著低于自根苗，為自根苗的86．61％。因此，嫁接減弱瞭銅脅迫對甜瓜幼苗光閤特性與礦質元素吸收的抑製作用，緩解瞭銅脅迫對甜瓜幼苗的毒害作用。
위탐색가접대동협박하첨과유묘광합특성여광질원소흡수적영향，선택료남과경흔침삼호위침목，박피첨과IVF09여후피첨과IVF117위접수，이자근묘위대조，채용기질재배법연구료동협박하첨과가접묘화자근묘적광합특성여광질원소흡수。결과표명：재동협박조건하，첨과유묘생물량하강、광합작용수억제、광질원소흡수평형파배。단재동일협박조건하，가접묘적생물량대우자근묘，광합색소함량고우자근묘，정광합속솔（ Pn）、증등속솔（ Tr）、기공도도（Gs）、포간CO2농도（Ci）현저대우자근묘，기공한제치（Ls）소우자근묘；가접개선료광질원소흡수，유효증가K、P、Na등적함량，감소Cu함량，IVF09가접묘협편Cu함량재800μmol/L Cu2＋협박하현저저우자근묘，부위자근묘적70．11％；이IVF117재400μmol/L Cu2＋협박하Cu함량현저저우자근묘，위자근묘적86．61％。인차，가접감약료동협박대첨과유묘광합특성여광질원소흡수적억제작용，완해료동협박대첨과유묘적독해작용。
The effects of grafting on photosynthetic characteristics and mineral elements of melon seedlings un -der copper stress in this study .Pumpkin Jingxinzhen NO .3 was carried out as stock ,melon IVF09 and muskmelon IVF117 as cion,and ungrafted seedlings as control .Here,we found that ,under copper stress ,the biomass of melon seedlings was decreased ,photosynthetic characteristics was inhibited and the absorption of mineral elements balance were destructed .But under the same stress conditions , the biomass and photosyntheic pigment content of grafted seedings were greater than that of ungrafted seedings .The net photosynthetic rate (Pn),transpiration rate (Tr), stomatal conductance (Gs) and intercellular CO2 concentration (Ci) were significantly higher than that of ungrafted seedlings,but Ls was lower .Grafting to improve the absorption of mineral elements ,effectively increase the content of K,P,Na,reduce the content of Cu ,Cu content of IVF09 grafting seedlings in leaf was significantly lower than that ungrafted seedlings under the 800 μmol/L Cu2+stress,since only that in 70.11%,the IVF117 grafting seedlings was significantly lower than that of ungrafted seedlings under 400 μmol/L Cu2+stress,since 86.61%.The test re-sults showed that the grafting reduced photosynthetic characteristics and mineral elements absorption inhibitory effect on melon seedlings under copper stress ,relieve the toxic effect on copper stress of melon seedlings .
