Abstract
Two field experiments of jojoba plants were carried out in Almaghara Research and Production Station followed to Desert Research Center, Agriculture Ministry, North Sinai Governorate, Egypt, at 2016/2017 and 2017/2018, Respectively. Therefor to study the influence yield of five clones (S-L, S-610, S- 700, S-B and S-G) under foliar spray of salicylic acid, ascorbic acid and proline [(50:50:50(conc. 1); 100:100:100 (conc. 2) and 200:200:200 ppm (conic. 3)] on jojoba plants at four and fourteen years old from planting. The experiment was conducted as split plot design, were varieties order in the main plots and treatments in sub plots, uisg three replicates. esults showed that the foliar application of salicylic acid, ascorbic acid and proline led to increase of all growth characters, yield characters and some chemical contents in leaves and seeds on all of clones. Clones S-700 recoded the highest values for all traits studied followed by clones S-B, while, studied traits, clones S-L recorded the lowest values. Foliar spray application with salicylic acid, ascorbic acid and proline had the highest data with all clones with aged fourteen years compear aged four years. All characters increased with increase in salicylic acid, ascorbic acid and proline on varieties, especially clone S-700. Jojoba plants appearance response to plant nutrition.
Highlights
Jojoba (Simmondsia chinensis Link Schneider) is an evergreen shrub that is native to northern México and the southwestern United States
It was found that inhibition of catalase, a H2O2 scavenging enzyme, by Salicylic acid (SA) plays an essential role in the generation of reactive oxygen species [21]
While this may seem like a distinction more important to chemists than plant biologists, the unique properties of proline are highly relevant to understanding its role in plants
Summary
Jojoba (Simmondsia chinensis Link Schneider) is an evergreen shrub that is native to northern México and the southwestern United States. Ascorbate has been shown to play multiple roles in plant growth, such as in cell division, cell wall expansion, and other developmental processes [37]. It requirements for growth and differentiation of some plant species have been reported [39]. The most fundamental is that proline is the only one of the proteogenic amino acids where the a-amino group is present as a secondary amine While this may seem like a distinction more important to chemists than plant biologists, the unique properties of proline are highly relevant to understanding its role in plants. The aim of this study was to evaluate the effects of salicylic acid, ascorbic acid and proline on five clones’ jojoba plants cultivated in Sinai and the effect on variation study between them
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