Effect of moderate high temperature on the vegetative growth and potassium allocation in olive plants

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• 作者：Marí ; a Benlloch-Gonzá ; lez^a ; ^{g72begom@uco.es} ; José ; Manuel Quintero^b ; Marí ; a Paz Suá ; rez^b ; Rosa Sá ; nchez-Lucas^c ; Ricardo Ferná ; ndez-Escobar^a ; Manuel Benlloch^a
• 关键词：High temperature ; Olea europaea L. ; Potassium allocation ; Growth ; Water relations
• 刊名：Journal of Plant Physiology
• 出版年：2016
• 出版时间：1 December 2016
• 年：2016
• 卷：207
• 期：Complete
• 页码：22-29
• 全文大小：1178 K
• 卷排序：207

文摘

There is little information about the prolonged effect of a moderately high temperature on the growth of olive (Olea europaea L.). It has been suggested that when the temperature of the air rises above 35 °C the shoot growth of olive is inhibited while there is any reference on how growth is affected when the soil is warmed. In order to examine these effects, mist-cuttings and young plants generated from seeds were grown under moderate high temperature (37 °C) for 64 and 42 days respectively. In our study, plant dry matter accumulation was reduced when the temperature of both the air and the root medium was moderately high. However, when the temperature of the root medium was 25 °C, the inhibitory effect of air high temperature on plant growth was not observed. The exposure of both the aerial part and the root to moderate high temperature also reduced the accumulation of K+ in the stem and the root, the water use efficiency and leaf relative water content. However, when only the aerial part was exposed to moderate high temperature, the accumulation of K+ in the stem, the water use efficiency and leaf relative water content were not modified. The results from this study suggest that the olive is very efficient in regulating the water and potassium transport through the plant when only the atmosphere surrounding the aerial part is warmed up. However, an increase in the soil temperature decrease root K+ uptake and its transport to the aerial parts resulting in a reduction in shoot water status and growth.