Effect of GA3 and 2,4-D foliar application on the anatomy of date palm (Phoenix dactylifera L.) seedling leaf

Abstract

Two concentrations (10-5M and 10-3M) of both GA3 and 2,4-D were used as foliar spray to evaluate the response of date palm (Phoenix dactylifera L.) cv. Khedri seedlings. They affected some of the anatomical characteristics of the first leaf emerging after the beginning of the spray. The high concentration of GA3 increased the size of the midrib and its vascular bundle numbers. Both low and high concentrations of 2,4-D inhibited the formation of the midrib. 2,4-D in both low and high concentrations decreased the number of vessels in both protoxylem and metaxylem and also decreased their diameters, where as GA3 in low and high concentrations have less effect on the number of vessels and its diameters. GA3 in high concentration increased the number of vascular bundles in 1mm long of the leaf blade, while 2,4-D in low and high concentrations decreased their numbers. 10-3M of 2,4-D increased the size and layers of special hypodermal cells.

Ciri Adaptasi Anatomi Daun Bougainvillea spectabilis W. Yang Dijangkiti Virus Bougainvillea chlorotic vein-banding

“…Tindakbalas antara perumah dan parasit menyebabkan peningkatan hormon GA (Frankenberger & Arshad 2019). Menurut kajian oleh Doaigey et al (2013), peningkatan kandungan GA mempamerkan peningkatan dan pembesaran berkas vaskular pada tulang daun Phoenix dactylifera L. Kandungan GA juga dikatakan dapat meningkatkan penghasilan enzim hidrolitik yang membebaskan tenaga bagi pertumbuhan yang membawa kepada pembahagian sel. Peningkatan bilangan berkas vaskular pada daun B. spectabilis dijangkiti dalam kajian ini juga jelas menunjukkan disebabkan oleh peningkatan asid giberelik.…”

Foliar nutrition of date palm: advances and applications. A review

“…Phloem consists of small parenchyma cells and mucous tubes located at the bottom of the leaflet. The leaflet of date palm also contains the bundle sheath consisting of thin-walled parenchyma cells, including green plastids (Doaigey et al, 2013).…”

Bioconversion of Dried Leaves from Algerian Date Palm (<i>Phoenix dactylifera</i> L.) to Biogas by Anaerobic Digestion

“…The bioenergy production from biomass is one of the effective solutions which can be used in Algeria. The date palm (Phoenix dactylifera L.) monocotyledon, which belongs to the family (Palmae or Arecaceae) [3] is an interesting agricultural biomass, grown extensively in the Algerian Sahara. In 2002, there were 13.5 million date palms, and presently (2017), the number exceeds 18 million [4,5].…”