Amparo Primo-Capella, María Dolores Molina-Nadal, Laura Catalá-Senent, Agustí de Miguel-Moreno, M. Forner-Giner, M. Martínez-Cuenca
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引用次数: 0
摘要
干旱正日益成为影响地中海盆地柑橘产量的非生物胁迫因素,而砧木可能会影响植物对干旱的反应。本研究比较了西班牙新兴的成熟砧木 Forner-Alcaide 5(FA-5)和 Orogrande 柑橘品种的常用商业砧木 Carrizo citrange(CC)对植物对水分减少的反应的影响。亏缺灌溉(DI)条件由 50% 的灌溉和蒸腾(ETc)确定。对树冠体积、产量、果实大小和果实内部质量进行了评估。CC DI 的减产主要是由于果实尺寸变小,而 FA-5 的减产则是由于果实数量减少,但果实直径未受影响。在Ct方面,CC DI的果实果汁含量较低,果皮百分比较高,而在FA-5砧木上,Ct和DI果树之间的差异较小。最显著的影响是 DI 处理的总可溶性糖(TSS)增加了。总之,FA-5砧木对水分胁迫下的奥罗格兰德柑橘影响最大。这些结果有助于解决柑橘的水分胁迫问题。
Response to Deficit Irrigation of ‘Orogrande’ Mandarin Grafted onto Different Citrus Rootstocks in Spain
Drought is increasingly becoming an abiotic stress factor that affects citrus yield in the Mediterranean Basin, and rootstocks may impact the plants’ responses to it. This study compares the influences of Forner-Alcaide 5 (FA-5), an emerging well-established rootstock in Spain, and Carrizo citrange (CC), the common commercial rootstock of the Orogrande mandarin variety, on plants’ responses to water reduction. The deficit irrigation (DI) condition was established by 50% irrigation and evapotranspiration (ETc). The canopy volume, yield, fruit size and fruit internal quality were evaluated. The yield reduction in the CC DI was mainly due to a smaller fruit size, but in FA-5, it was due to fewer fruits without an affected caliber. Regarding Ct, the fruits from the CC DI had lower juice contents and higher rind percentages, while the differences between the Ct and DI trees were smaller in the FA-5 rootstock. The most remarkable effect was the increase in total soluble sugars (TSS) for the DI treatment. To conclude, the FA-5 rootstock had the strongest influence on Orogrande mandarin under water stress. These results can be useful for addressing water stress problems in citrus.