植物营养与肥料学报2017，Vol.23Issue(2)：476-483,8.DOI:10.11674/zwyf.16145
硼利用效率不同的柑橘砧木光合性能差异研究
Leaf photosynthetic characteristics of citrus rootstocks with different boron efficiency
摘要
Abstract
[Objectives] This paper showed the study of the difference in photosynthetic characteristics between citrange [boron (B)-insensitivity] and trifoliate orange (B-sensitivity) seedlings.[Methods] Hydroponic experiments were conducted with 5 B levels,including 0 (B0)、2 (B2)、5 (B5)、10 (B10) and 50 μmol/L (B50).The difference of B-efficiency and photosynthesis between the two rootstocks was analyzed according to the concentration of B forms,photosynthetic pigment,net photosynthetic rate and carbohydrate.[Results] The B effective utilization rate of citrange sample was higher than trifoliate orange sample under the same treatment,especially in the treatment of B0.The citrange used 38.6％ more B compared with trifoliate orange.Under the different B treatments,R value (R=semi-bound B/free B) was much lower in trifoliate orange samples than citrange samples,which indicated B utilization of citrange at the cellular level was significantly higher than trifoliate orange.B deficiency reduced photosynthetic pigment content (Chl a,Chl b,Car) of two rootstocks leaves,and there were much more significant effects of B deficiency on trifoliate orange.B deficiency significantly reduced the net photosynthetic rate in both two rootstocks.The net photosynthetic rate was significantly higher in citrange than trifoliate under the condition of B-deficiency (B0,B2,B5) and rich B (B50).There was a higher content of soluble sugars,fructose,and starch in B0 treated samples compared with other treatments.Under B-deficiency treatment,moreover,a higher level of soluble sugars,sucrose,and fructose was observed in trifoliate orange than that in citrange.[Conclusions] Citrange showed more effective B utilization than trifoliate orange.The differences of photosynthetic characteristics and accumulation of photosynthetic products could be one of the key factors leading to the different B-efficiency of two rootstocks.关键词
柑橘砧木/硼水平/硼效率/光合性能Key words
citrus rootstock/boron levels/boron efficiency/photosynthetic characteristics引用本文复制引用
卢晓佩,姜存仓,董肖昌,吴秀文,闫磊..硼利用效率不同的柑橘砧木光合性能差异研究[J].植物营养与肥料学报,2017,23(2):476-483,8.基金项目
国家自然科学基金(41271320) （41271320）
中央高校基本科研业务费专项(2013PY093)资助. （2013PY093）
