Influence of rootstocks on pistachio (Pistacia vera L.) water relations

Pistachio potted plants budded on three different rootstocks were submitted to water stress during 28 days with the aim of studying their water relations and physiological responses. Water stress resulted in an accented drop of stem water potential and leaf conductance. Nonetheless, pistachio plants showed a great capacity to contrast drought effects by the recourse to osmotic adjustment mechanisms. Regarding rootstocks, UCB-I results being the less adapted rootstock to conditions of water stress

Saving irrigation water as a tool to increase pomegranate fruit price and enhance the bioactive compound content

The non-climateric character of pomegranate (P. granatum) fruit underlines the importance of determining the optimum harvest time to improve fruit quality. The effect of irrigation withholding during 6, 15, 25 and 36 d before harvest was evaluated in order to clarify whether fruit ripening is critical or non-critical from the yield, fruit characteristics and composition point of view. The results indicated that this phenological period is critical because irrigation is essential during most of this phenological period to achieve maximum yield. However, a 6 d of irrigation restriction at the end of ripening period can be used as a tool to come early harvest time, saves irrigation water, enhances the bioactive compounds (anthocyanins, phenolic compounds, punicalagin and ellagic acid) and increases the price of the fruit without affecting marketable yield and fruit size