Masumeh Abbasi; Mokhtar Heidari; Mojtaba Rahimi
Abstract
As seed germination of Guava (Psidium guajava) is poor and time-consuming, the effects of seed extraction technique and scarification methods on the seed germination and seedling growth of Guava cv. Allahabad safeda, were investigated. First experiment was conducted on extraction of Guava seeds using ...
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As seed germination of Guava (Psidium guajava) is poor and time-consuming, the effects of seed extraction technique and scarification methods on the seed germination and seedling growth of Guava cv. Allahabad safeda, were investigated. First experiment was conducted on extraction of Guava seeds using sulfuric acid (H2SO4) : seed ratios including: 1:5, 2:5 and 3:5) or manual extraction (control) methods to investigate the effect of these methods on seed germination. The best extraction method was soaking in H2SO4 (H2SO4): seed ratio 1:5); these seeds exhibited the highest germination (70%) and root dry weight (340 mg). In second experiment, seed scarification using sulfuric acid (H2SO4 ) was compared with scarification using hydrochloric acid (HCl). Results showed that seed germination and root growth of seedlings were increased by scarification using HCl for 10 or 15 minutes. It seems that delaying seed germination of guava (Psidium guajava) is mainly related to seed coat hardiness and physical dormancy.
Masoomeh Abbasy; Abdolrasul Zakerin; Mokhtar Heidari
Abstract
Abstract
Mango is one of the most important tropical fruits in Iran and salinity is an important problem to mango production in ‘Hormozgan’ province and other mango growing areas in Iran. At present experiment the effects of saline irrigation water of different sodium chloride concentration on vegetative ...
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Abstract
Mango is one of the most important tropical fruits in Iran and salinity is an important problem to mango production in ‘Hormozgan’ province and other mango growing areas in Iran. At present experiment the effects of saline irrigation water of different sodium chloride concentration on vegetative growth and ion content of mango was evaluated. Treatments comprised two type of cultivars (‘Sendry’ and ‘Charak’) and four water irrigation salinity regimes (1.5, 3.0, 4.5 or 6.0 ds/m). Results showed that salinity significantly decreased shoot and root dry weight, water content and increased root/ shoot dry weight ratio. Salinity significantly increased the sodium and chloride ions in shoot or roots and decreased the potassium content in roots. Also, salinity decreased the potassium/ sodium ratio in roots and shoots. The results demonstrated that ‘Sendry’ cultivar was slightly more tolerant to salinity than ‘Charak’.
Keywords: Mango(Mangifera indica L.), Salinity, Vegetative growth, Ion
