Panicles characteristics of mature alphonse mango trees as influenced by some autumn - winter foliar sprays with urea, GA3and PBZ [electronic resource].

By: Contributor(s): Language: English Summary language: Arabic Description: p.3355-3370Other title:
  • خواص الشماريخ الزهرية للاشجار البالغة من المانجو صنف الفونس و تأثيرها ببعض معاملات اليوريا و حمض الجبرليك و الكلتار اثناء الخريف و الشتاء.‪ [Added title page title]
Uniform titles:
  • Mansoura University journal of agricultural sciences, 2005 v. 30 (6) [electronic resource].
Subject(s): Online resources: In: Mansoura University Journal of Agricultural Sciences 2005.v.30(6)Summary: In 20011 2002 and 200212003 seasons, mature Alphonse mango tree received 4 foliar sprays at monthly intervals from mid Oct. to mid Jan. The tested treatments were: Cont. ( water), GAJ (alone) at 10 ppm, GAJ ( alone) at 20 ppm , Pacloputrazol (PBZ) (alone) at 500 ppm , PBZ (alone) at 1000 ppm, urea (alone) at 1%, GAJ 10 ppm + urea 1% , GAJ 20 ppm + urea 1% , PBZ 500 ppm + urea 1% and PBZ 1000 ppm + urea 1 %. GAJ at both tested concentrations, with 1 or without urea , tended to delay panicle emergence , flowering and fruit set, increased number of perfect flowersl panicle and panicle length. Worthwhile, the same treatments tended to increase the number of healthy panicles and total number of panicles 1 tree, while obviously depressed number of malformed panicles 1 tree and malformation percentage. On the other hand, treatments implying PBZ at both tested concentrations, (500 & 1000 ppm) , with 1 or without urea, tended to advance panicle emergence, flowering and fruit-set. The same treatments increased number of panicles 1 tree but also increased number of malformed paniclesl tree and malformation %. Also, treatments implying PBZ , particularly at the higher concentration (1000 ppm) greatly increased number of male flowers and total number of flowers/ panicle and promoted the sex ratio ( male: perfect flowers). The malformed panicles revealed higher contents of total phenols and total free amino acids as well as endogenous IAA and ABA as compared with healthy ones. On the other hand, the malformed panicles exhibited lower total indoles and endogenous GA as compared with healthy ones.
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In 20011 2002 and 200212003 seasons, mature Alphonse mango tree received 4 foliar sprays at monthly intervals from mid Oct. to mid Jan. The tested treatments were: Cont. ( water), GAJ (alone) at 10 ppm, GAJ ( alone) at 20 ppm , Pacloputrazol (PBZ) (alone) at 500 ppm , PBZ (alone) at 1000 ppm, urea (alone) at 1%, GAJ 10 ppm + urea 1% , GAJ 20 ppm + urea 1% , PBZ 500 ppm + urea 1% and PBZ 1000 ppm + urea 1 %. GAJ at both tested concentrations, with 1 or without urea , tended to delay panicle emergence , flowering and fruit set, increased number of perfect flowersl panicle and panicle length. Worthwhile, the same treatments tended to increase the number of healthy panicles and total number of panicles 1 tree, while obviously depressed number of malformed panicles 1 tree and malformation percentage. On the other hand, treatments implying PBZ at both tested concentrations, (500 & 1000 ppm) , with 1 or without urea, tended to advance panicle emergence, flowering and fruit-set. The same treatments increased number of panicles 1 tree but also increased number of malformed paniclesl tree and malformation %. Also, treatments implying PBZ , particularly at the higher concentration (1000 ppm) greatly increased number of male flowers and total number of flowers/ panicle and promoted the sex ratio ( male: perfect flowers). The malformed panicles revealed higher contents of total phenols and total free amino acids as well as endogenous IAA and ABA as compared with healthy ones. On the other hand, the malformed panicles exhibited lower total indoles and endogenous GA as compared with healthy ones.

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