Mohamed, M. H. <br/><br/>
Response of watermelon plants grafted onto different cucurbit rootstocks to sub-optimal growing temperature  [electronic resource] 
 إستجابة نباتات البطيخ المطعومة على أصول مختلفة لحرارة النمو الأقل من المثلي 

 - p. 25-34. 
<br/><br/>Includes bibliographic reference 
<br/><br/> This study was conducted to examine the relative tolerance of grafted watermelon to sub-optimal growing temperature conditions. <br/>Watermelon cv. Aswan scions were grafted onto different rootstocks, namely Giada, Shintoza, StrongToza, and Ferro. Grafted <br/>and un-grafted seedlings were grown in the field under low temperature during Jan.-Apr. to be compared to those growing under <br/>normal warm season conditions (Mar.-Jun.). Results indicated significant decrease in growth, yield, chlorophyll, and carotenoids <br/>in all grafted plants, in different degrees, depending on the graft combination. In this regards, plants of Aswan/Ferro recorded <br/>more than double the marketable yield of un-grafted ones under sub-optimal temperature, indicating the relative tolerance of <br/>Aswan/Ferro to cold stress. While, un-grafted plants exhibited the highest decline in all growth and yield parameters. <br/>Leaf proline content and the activities of anti-oxidant enzymes (SOD and CAT) were higher under cold stress than the control. <br/>It is concluded that grafted watermelon plants were relatively tolerant to sub-optimal temperature than un-grafted ones which <br/>could enable the production of out of season crop.<br/> 
<br/><br/><br/>Summary in Arabic 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Watermelons --Growth<br/>Watermelons --Fertilizers<br/>Watermelons --Effect of cold on