Abstract
Leucophyllum frutescens is an evergreen shrub renowned for its drought tolerance. Paclobutrazol (PBZ) and cycocel (CCC) growth retardants were applied as foliar spray on L. frutescens plants cultivated in pots to assay the possibility of increasing these plants’ tolerance to water stress while maintaining high quality. The experiment was accomplished under full sun in the open field of the Nursery of Ornamental Plants and Landscape Gardening Res. Dept., Hort. Res. Inst., ARC, Egypt during the 2022 and 2023 seasons. Different concentrations of PBZ at 50, 100 and 150 ppm and CCC at 1000, 2000 and 3000 ppm were combined with 100, 75 and 50% pot capacity (P.C.) irrigation water levels, and some morphological, chemical and tolerance indices were examined. The obtained results showed a great reduction in all studied parameters except for proline content due to reduced irrigation levels. All growth retardants applied increased the values over control except for plant height and fresh weight of 10 flowers. Regarding the interaction treatments, the highest concentration of PBZ (150 ppm) and CCC (3000) produced the highest values in most cases when combined with both 75 and 50% irrigation water levels. Such treatments increased the number of main and lateral branches/plant, fresh and dry weights of vegetative growth and roots and root length, while mediated values were obtained for chemical constituents. Water use efficiency, relative stress index and stress tolerance index are also, greatly enhanced by such treatments. Cycocel at 3000 ppm could be recommended to treat Leucophyllum frutescens plants cultivated in 30 cm pots and subjected to only 50% irrigation water level as this treatment demonstrated good performance with high stress tolerance index to drought.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Reduced irrigation levels greatly reduced all studied parameters except proline content in Leucophyllum frutescens.
- Taxon
- Leucophyllum frutescens
_Leucophyllum_frutescens.jpg?width=60)
Leucophyllum frutescense0 - Treatment
- reduced irrigation levelse1
- Outcome
- all studied parameterse1
- Direction
- great reductione1
- Setting
- open fielde2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Leucophyllum_frutescens.jpg?width=500)
Verbatim
e0“Leucophyllum frutescens is an evergreen shrub renowned for its drought tolerance”
e1“The obtained results showed a great reduction in all studied parameters except for proline content due to reduced irrigation levels”
e2“open field of the Nursery of Ornamental Plants and Landscape Gardening Res. Dept., Hort. Res. Inst., ARC, Egypt”
Claim · model-written summary
All growth retardants increased the measured values over control in Leucophyllum frutescens, except plant height and fresh weight of 10 flowers.
- Taxon
- Leucophyllum frutescensLeucophyllum frutescense0
- Treatment
- growth retardantse1
- Outcome
- valuese1
- Direction
- increasede1
- Qualifier
- except for plant height and fresh weight of 10 flowerse1
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leucophyllum frutescens is an evergreen shrub renowned for its drought tolerance”
e1“All growth retardants applied increased the values over control except for plant height and fresh weight of 10 flowers”
Claim · model-written summary
The highest PBZ and CCC concentrations increased main and lateral branches per plant in Leucophyllum frutescens under reduced irrigation.
- Taxon
- Leucophyllum frutescensLeucophyllum frutescense0
- Treatment
- the highest concentration of PBZ (150 ppm) and CCC (3000)e1
- Outcome
- number of main and lateral branches/plante2
- Direction
- increasede2
- Qualifier
- 75 and 50% irrigation water levelse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leucophyllum frutescens is an evergreen shrub renowned for its drought tolerance”
e1“the highest concentration of PBZ (150 ppm) and CCC (3000) produced the highest values in most cases when combined with both 75 and 50% irrigation water levels”
e2“Such treatments increased the number of main and lateral branches/plant, fresh and dry weights of vegetative growth and roots and root length”
Claim · model-written summary
The highest PBZ and CCC concentrations increased fresh and dry weights of vegetative growth and roots in Leucophyllum frutescens under reduced irrigation.
- Taxon
- Leucophyllum frutescensLeucophyllum frutescense0
- Treatment
- the highest concentration of PBZ (150 ppm) and CCC (3000)e1
- Outcome
- fresh and dry weights of vegetative growth and rootse2
- Direction
- increasede2
- Qualifier
- 75 and 50% irrigation water levelse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leucophyllum frutescens is an evergreen shrub renowned for its drought tolerance”
e1“the highest concentration of PBZ (150 ppm) and CCC (3000) produced the highest values in most cases when combined with both 75 and 50% irrigation water levels”
e2“Such treatments increased the number of main and lateral branches/plant, fresh and dry weights of vegetative growth and roots and root length”
Claim · model-written summary
The highest PBZ and CCC concentrations increased root length in Leucophyllum frutescens under reduced irrigation.
- Taxon
- Leucophyllum frutescensLeucophyllum frutescense0
- Treatment
- the highest concentration of PBZ (150 ppm) and CCC (3000)e1
- Outcome
- root lengthe2
- Direction
- increasede2
- Qualifier
- 75 and 50% irrigation water levelse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leucophyllum frutescens is an evergreen shrub renowned for its drought tolerance”
e1“the highest concentration of PBZ (150 ppm) and CCC (3000) produced the highest values in most cases when combined with both 75 and 50% irrigation water levels”
e2“Such treatments increased the number of main and lateral branches/plant, fresh and dry weights of vegetative growth and roots and root length”
Claim · model-written summary
The highest PBZ and CCC concentrations greatly enhanced water use efficiency, relative stress index and stress tolerance index in Leucophyllum frutescens.
- Taxon
- Leucophyllum frutescensLeucophyllum frutescense0
- Treatment
- the highest concentration of PBZ (150 ppm) and CCC (3000)e1
- Outcome
- Water use efficiency, relative stress index and stress tolerance indexe2
- Direction
- greatly enhancede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leucophyllum frutescens is an evergreen shrub renowned for its drought tolerance”
e1“the highest concentration of PBZ (150 ppm) and CCC (3000) produced the highest values in most cases when combined with both 75 and 50% irrigation water levels”
e2“Water use efficiency, relative stress index and stress tolerance index are also, greatly enhanced by such treatments”
Claim · model-written summary
Cycocel at 3000 ppm can be recommended for Leucophyllum frutescens in 30 cm pots at 50% irrigation water level.
- Taxon
- Leucophyllum frutescensLeucophyllum frutescense0
- Outcome
- Cycocel at 3000 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cycocel at 3000 ppm could be recommended to treat Leucophyllum frutescens plants cultivated in 30 cm pots and subjected to only 50% irrigation water level”