Ghulam Abbas Narejo, Ameer Ahmed Mirbahar, Sanaullah Yasin, Rafat Saeed
{"title":"KNO3-riming 对盐碱条件下棉花(Gossypium hirsutum L.)农艺、理化和纤维属性的影响","authors":"Ghulam Abbas Narejo, Ameer Ahmed Mirbahar, Sanaullah Yasin, Rafat Saeed","doi":"10.1111/jac.12779","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>Salinity stress presents a challenging dilemma for plant growth and development. It disrupts cotton (<i>Gossypium hirsutum</i> L.) yield through an immediate osmotic and a slower ionic phase, ultimately diminishing its fibre quality. Seed priming, a low-cost seed pre-treatment, mitigates these effects by triggering prior metabolic processes and subsequent gene expression. This pioneering work aimed to improve agronomic, physicochemical parameters and fibre characteristics in cotton genotypes (GH-Baghdadi and GH-Mubarak) by potassium nitrate (KNO<sub>3</sub>) mediated osmopriming (1.25% and 1.5% conc.) for 15, 20 and 25 h, along with an un-primed control under saline field conditions. The randomised complete block design experiment in triplicate was conducted in 2019 and 2020 at the soil with electrical conductivity (extract) (EC<sub>e</sub>) 9.44 dS m<sup>−1</sup> to investigate optimal priming media and priming duration. The results showed that salinity impaired physicochemical and agronomic parameters in the control experiment. However, seed priming with 1.5% KNO<sub>3</sub> for 20 h significantly improved the yield and yield contributing components in both genotypes. Maximum values for chlorophyll (Chl) <i>a</i> and <i>b</i> were recorded at 1.50 and 0.90 mg g<sup>−1</sup> fresh weight (FW), respectively, under this treatment. Similarly, the chlorophyll-<i>a</i> fluorescence parameters (Chl-<i>a</i> FPs), such as the maximum quantum yield of photosystem II (<i>Fv/F<sub>m</sub> </i>) (0.83), effective quantum yield of PSII (Φ<sub>PSII</sub>) (0.76) and photochemical quenching coefficient (<i>qP</i>) (0.85), indicated improved light harvesting, electron transport and photosynthetic capacity. Furthermore, the net photosynthetic rate (<i>P</i><sub><i>n</i></sub>) increased to 19.65 mmol CO<sub>2</sub> m<sup>−2</sup> s<sup>−1</sup>, while stomatal conductance (<i>g</i><sub><i>s</i></sub>) reached 28.39 mmol CO<sub>2</sub> m<sup>−2</sup> s<sup>−1</sup> at the same treatment. A strongly positive correlation was found between chl-<i>a</i> FPs and net photosynthetic yield. Enzymatic activities, including catalase (CAT) at 2.17 unit mg<sup>−1</sup>, superoxide dismutase (SOD) at 1.05 unit mg<sup>−1</sup> and peroxidase (POD) at 1.50 unit mg<sup>−1</sup> were significantly enhanced, along with leaf potassium (K) (14.3 mg g<sup>−1</sup> dry weight [DW]) and calcium (Ca) (6.7 mg g<sup>−1</sup> DW), particularly in GH-Mubarak. Seed-cotton yield (SCY) increased to 5274 kg h<sup>−1</sup> and fibre strength (FS) improved to 31.3 thousand pounds per square inch (tppsi), while ginning out-turn (GOT) reached a maximum of 45% at 1.5% KNO<sub>3</sub> for 20 h in both genotypes. The micronaire value (4 μg in.<sup>−2</sup>) significantly decreased, indicating improved fibre fineness. Correlation analysis revealed a strong positive correlation between physicochemical and agronomic traits, particularly gas exchange characteristics, chlorophyll content and Chl-<i>a</i> FPs, which are strongly associated with SCY and fibre characteristics. In conclusion, priming cotton seeds with 1.5% KNO<sub>3</sub> for 20 h is a promising strategy for mitigating salinity stress and enhancing physicochemical attributes and agronomic traits, ultimately leading to improved cotton yield and fibre quality.</p>\n </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":null,"pages":null},"PeriodicalIF":3.7000,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of KNO3-Priming on Agronomic, Physicochemical and Fibre Attributes of Cotton (Gossypium hirsutum L.) Under Saline Conditions\",\"authors\":\"Ghulam Abbas Narejo, Ameer Ahmed Mirbahar, Sanaullah Yasin, Rafat Saeed\",\"doi\":\"10.1111/jac.12779\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n <p>Salinity stress presents a challenging dilemma for plant growth and development. It disrupts cotton (<i>Gossypium hirsutum</i> L.) yield through an immediate osmotic and a slower ionic phase, ultimately diminishing its fibre quality. Seed priming, a low-cost seed pre-treatment, mitigates these effects by triggering prior metabolic processes and subsequent gene expression. This pioneering work aimed to improve agronomic, physicochemical parameters and fibre characteristics in cotton genotypes (GH-Baghdadi and GH-Mubarak) by potassium nitrate (KNO<sub>3</sub>) mediated osmopriming (1.25% and 1.5% conc.) for 15, 20 and 25 h, along with an un-primed control under saline field conditions. The randomised complete block design experiment in triplicate was conducted in 2019 and 2020 at the soil with electrical conductivity (extract) (EC<sub>e</sub>) 9.44 dS m<sup>−1</sup> to investigate optimal priming media and priming duration. The results showed that salinity impaired physicochemical and agronomic parameters in the control experiment. However, seed priming with 1.5% KNO<sub>3</sub> for 20 h significantly improved the yield and yield contributing components in both genotypes. Maximum values for chlorophyll (Chl) <i>a</i> and <i>b</i> were recorded at 1.50 and 0.90 mg g<sup>−1</sup> fresh weight (FW), respectively, under this treatment. Similarly, the chlorophyll-<i>a</i> fluorescence parameters (Chl-<i>a</i> FPs), such as the maximum quantum yield of photosystem II (<i>Fv/F<sub>m</sub> </i>) (0.83), effective quantum yield of PSII (Φ<sub>PSII</sub>) (0.76) and photochemical quenching coefficient (<i>qP</i>) (0.85), indicated improved light harvesting, electron transport and photosynthetic capacity. Furthermore, the net photosynthetic rate (<i>P</i><sub><i>n</i></sub>) increased to 19.65 mmol CO<sub>2</sub> m<sup>−2</sup> s<sup>−1</sup>, while stomatal conductance (<i>g</i><sub><i>s</i></sub>) reached 28.39 mmol CO<sub>2</sub> m<sup>−2</sup> s<sup>−1</sup> at the same treatment. A strongly positive correlation was found between chl-<i>a</i> FPs and net photosynthetic yield. Enzymatic activities, including catalase (CAT) at 2.17 unit mg<sup>−1</sup>, superoxide dismutase (SOD) at 1.05 unit mg<sup>−1</sup> and peroxidase (POD) at 1.50 unit mg<sup>−1</sup> were significantly enhanced, along with leaf potassium (K) (14.3 mg g<sup>−1</sup> dry weight [DW]) and calcium (Ca) (6.7 mg g<sup>−1</sup> DW), particularly in GH-Mubarak. Seed-cotton yield (SCY) increased to 5274 kg h<sup>−1</sup> and fibre strength (FS) improved to 31.3 thousand pounds per square inch (tppsi), while ginning out-turn (GOT) reached a maximum of 45% at 1.5% KNO<sub>3</sub> for 20 h in both genotypes. The micronaire value (4 μg in.<sup>−2</sup>) significantly decreased, indicating improved fibre fineness. Correlation analysis revealed a strong positive correlation between physicochemical and agronomic traits, particularly gas exchange characteristics, chlorophyll content and Chl-<i>a</i> FPs, which are strongly associated with SCY and fibre characteristics. In conclusion, priming cotton seeds with 1.5% KNO<sub>3</sub> for 20 h is a promising strategy for mitigating salinity stress and enhancing physicochemical attributes and agronomic traits, ultimately leading to improved cotton yield and fibre quality.</p>\\n </div>\",\"PeriodicalId\":14864,\"journal\":{\"name\":\"Journal of Agronomy and Crop Science\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.7000,\"publicationDate\":\"2024-11-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Agronomy and Crop Science\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/jac.12779\",\"RegionNum\":2,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"AGRONOMY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Agronomy and Crop Science","FirstCategoryId":"97","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/jac.12779","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRONOMY","Score":null,"Total":0}
Effect of KNO3-Priming on Agronomic, Physicochemical and Fibre Attributes of Cotton (Gossypium hirsutum L.) Under Saline Conditions
Salinity stress presents a challenging dilemma for plant growth and development. It disrupts cotton (Gossypium hirsutum L.) yield through an immediate osmotic and a slower ionic phase, ultimately diminishing its fibre quality. Seed priming, a low-cost seed pre-treatment, mitigates these effects by triggering prior metabolic processes and subsequent gene expression. This pioneering work aimed to improve agronomic, physicochemical parameters and fibre characteristics in cotton genotypes (GH-Baghdadi and GH-Mubarak) by potassium nitrate (KNO3) mediated osmopriming (1.25% and 1.5% conc.) for 15, 20 and 25 h, along with an un-primed control under saline field conditions. The randomised complete block design experiment in triplicate was conducted in 2019 and 2020 at the soil with electrical conductivity (extract) (ECe) 9.44 dS m−1 to investigate optimal priming media and priming duration. The results showed that salinity impaired physicochemical and agronomic parameters in the control experiment. However, seed priming with 1.5% KNO3 for 20 h significantly improved the yield and yield contributing components in both genotypes. Maximum values for chlorophyll (Chl) a and b were recorded at 1.50 and 0.90 mg g−1 fresh weight (FW), respectively, under this treatment. Similarly, the chlorophyll-a fluorescence parameters (Chl-a FPs), such as the maximum quantum yield of photosystem II (Fv/Fm) (0.83), effective quantum yield of PSII (ΦPSII) (0.76) and photochemical quenching coefficient (qP) (0.85), indicated improved light harvesting, electron transport and photosynthetic capacity. Furthermore, the net photosynthetic rate (Pn) increased to 19.65 mmol CO2 m−2 s−1, while stomatal conductance (gs) reached 28.39 mmol CO2 m−2 s−1 at the same treatment. A strongly positive correlation was found between chl-a FPs and net photosynthetic yield. Enzymatic activities, including catalase (CAT) at 2.17 unit mg−1, superoxide dismutase (SOD) at 1.05 unit mg−1 and peroxidase (POD) at 1.50 unit mg−1 were significantly enhanced, along with leaf potassium (K) (14.3 mg g−1 dry weight [DW]) and calcium (Ca) (6.7 mg g−1 DW), particularly in GH-Mubarak. Seed-cotton yield (SCY) increased to 5274 kg h−1 and fibre strength (FS) improved to 31.3 thousand pounds per square inch (tppsi), while ginning out-turn (GOT) reached a maximum of 45% at 1.5% KNO3 for 20 h in both genotypes. The micronaire value (4 μg in.−2) significantly decreased, indicating improved fibre fineness. Correlation analysis revealed a strong positive correlation between physicochemical and agronomic traits, particularly gas exchange characteristics, chlorophyll content and Chl-a FPs, which are strongly associated with SCY and fibre characteristics. In conclusion, priming cotton seeds with 1.5% KNO3 for 20 h is a promising strategy for mitigating salinity stress and enhancing physicochemical attributes and agronomic traits, ultimately leading to improved cotton yield and fibre quality.
期刊介绍:
The effects of stress on crop production of agricultural cultivated plants will grow to paramount importance in the 21st century, and the Journal of Agronomy and Crop Science aims to assist in understanding these challenges. In this context, stress refers to extreme conditions under which crops and forages grow. The journal publishes original papers and reviews on the general and special science of abiotic plant stress. Specific topics include: drought, including water-use efficiency, such as salinity, alkaline and acidic stress, extreme temperatures since heat, cold and chilling stress limit the cultivation of crops, flooding and oxidative stress, and means of restricting them. Special attention is on research which have the topic of narrowing the yield gap. The Journal will give preference to field research and studies on plant stress highlighting these subsections. Particular regard is given to application-oriented basic research and applied research. The application of the scientific principles of agricultural crop experimentation is an essential prerequisite for the publication. Studies based on field experiments must show that they have been repeated (at least three times) on the same organism or have been conducted on several different varieties.