Hamed Narimani; Raouf Seyed Sharif; Fatemeh Aghaei
Abstract
Objective: This experiment was conducted to investigate the effects of nanoparticles (Zn and Si) and putrescine on grain-filling components of wheat under salinity stress.
Methods: An experimental factorial based on a randomized complete block design with three replications was held in the research greenhouse ...
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Objective: This experiment was conducted to investigate the effects of nanoparticles (Zn and Si) and putrescine on grain-filling components of wheat under salinity stress.
Methods: An experimental factorial based on a randomized complete block design with three replications was held in the research greenhouse of the University of Mohaghegh Ardabili during 2022. Factors experimental included salinity at four levels (no application of salinity as a control, application of 40, 80 and 120 mM salinity with NaCl), nanoparticle and putrescine foliar application at eight levels (foliar application with water as a control, foliar application of 50 mg.L-1 of Si, foliar application of 1 g.L-1 of Zn, foliar application of 1 mM putrescine, foliar application of Si-Zn, foliar application of Si and putrescine, foliar application of Zn and putrescine, foliar application of Si-Zn and putrescine).
Results: The results showed that the highest grain-filling period and effective grain-filling period were obtained in nanoparticles and putrescine foliar application. This treatment combination under no salinity increased root weight and volume (48.1 and 53.03% respectively), chlorophyll index (45.75%), and grain-filling rate (20%). There was an increase of 45.34, 62.72, 40.5, 36.21 and 37.37%, respectively, in plant height, spike length, number of grains per spike, 100 grains weight and grain yield under no salinity and foliar application with nanoparticle and putrescine in compared with no foliar application under 120 mM salinity.
Conclusion: It seems that the foliar application of nanoparticles and putrescine under salinity can increase the yield of wheat by improving root characteristics and grain-filling components.
Hatam Hatami; Golamreza Mohsenabadi; Masoud Esfahani; Bahman Amiri garijani; Ali Aalami
Abstract
Dry matter remobilization, grain filling rate and duration has principle role on rice grain yield, and environment condition directly affect on them. For study the influence of climate factors a factorial field experiment in randomized complete blocks design with three replications conducted at Haraz ...
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Dry matter remobilization, grain filling rate and duration has principle role on rice grain yield, and environment condition directly affect on them. For study the influence of climate factors a factorial field experiment in randomized complete blocks design with three replications conducted at Haraz Extention and Technology Development Centre in Spring 2013. Treatments included rice cultivars namely; Samadi, Tarom Hashemi, Local Tarom, Shiroudi, Keshvari, Gohar and transplanting times (5th may, 20th may and 10th June). Results showed that dry matter remobilization rate, stem dry matter remobilization efficiency, grain filling rate and duration, and grain yield varied significantly among different transplanting times. Transplanting time on 5th may was higher than other two transplanting dates in all traits except for grain filling rate. Tarom Hashemi had highest and improved variety, Shiroodi had lowest grain filling rate. Dry matter remobilization rate, Stem dry matter remobilization efficiency, effective grain filling duration, and grain yield was higher in Shiroudi among rice cultivars. Grain yield negatively correlated with grain filling rate. Increasing in grain filling duration with increased dry matter remobilization had more effective role in rice cultivars grain yield. Increasing temperature in vegetative growth phase with increasing in accumulated growing degree day accompanied with decreasing in tiller number, less tiller number caused higher grain filling rate and lower grain filling duration and dry matter remobilization restriction that decreased grain yield.