Optimizing Seed Physiological Maturity and Quality in Camelina Through Plant Density Variation: A Nonlinear Regression Approach

IF 1.4 Q3 AGRONOMY
Esmaeil Bakhshandeh, Raoudha Abdellaoui, Fatemeh Hosseini Sanehkoori, Hamidreza Ghorbani, Najmeh Mirzaaghpour
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Abstract

Investigations into the seed physiological maturity (PM) and achieving optimal seed quality (SQ) across varying plant densities are crucial. This is because harvesting seeds at the right time is critical to assure their viability and vigor. The use of nonlinear regression models could estimate the accurate time of PM and SQ in camelina at all plant densities based on days after flowering (DAF) and/or seed moisture content (SMC). To attain this goal, camelina seeds were sown manually at a 2–3 cm burial depth with four plant densities (150, 600, 1050, and 1500 m−2 with ± 5% bias) in eight replicates. Seeds were sampled from 10 DAF at regular intervals every 5 or 10 days (depending on the weather conditions) for all plant densities. We examined the changes in fresh weight, dry weight, moisture content, oil content, and electrical conductivity of seeds. We also studied seed germination rate, normal seedling, and dry weight and length of seedlings about the flowering date across different plant densities. Our results were successful in accurately predicting the timing PM and SQ in camelina across all plant densities using DAF and/or SMC (R2 ≥ 80) as a basis. Besides, no significant difference among all studied plant densities in terms of the studied traits was detected. These findings enable the fine-tuning of agronomic practices, such as determining the optimal harvest period. They also provide valuable support for developmental studies aiming to establish connections between physiological parameters and genetic or physiological factors.

通过植株密度变化优化荠菜种子的生理成熟度和质量:非线性回归方法
对种子生理成熟度(PM)和在不同植株密度下实现最佳种子质量(SQ)的研究至关重要。因为在正确的时间收获种子对于确保种子的存活率和活力至关重要。使用非线性回归模型可以根据花后天数(DAF)和/或种子含水量(SMC)估算出所有植株密度下荠菜的 PM 和 SQ 的准确时间。为实现这一目标,荠菜种子以 2-3 厘米的埋藏深度人工播种,四种植物密度(150、600、1050 和 1500 m-2,偏差 ± 5%),八次重复。在所有植物密度下,每隔 5 天或 10 天(取决于天气条件)从 10 DAF 开始对种子进行取样。我们研究了种子鲜重、干重、含水量、含油量和导电率的变化。我们还研究了不同种植密度的种子发芽率、正常幼苗、幼苗干重和花期长度。以 DAF 和/或 SMC(R2 ≥ 80)为基础,我们的结果成功地预测了所有植株密度下荠菜的 PM 和 SQ 时间。此外,所有研究的植株密度在所研究的性状方面均未发现明显差异。这些发现有助于对农艺实践进行微调,如确定最佳收获期。它们还为旨在建立生理参数与遗传或生理因素之间联系的发育研究提供了宝贵的支持。
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来源期刊
CiteScore
3.80
自引率
0.00%
发文量
24
期刊介绍: The main objective of this initiative is to promote agricultural research and development. The journal will publish high quality original research papers and critical reviews on emerging fields and concepts for providing future directions. The publications will include both applied and basic research covering the following disciplines of agricultural sciences: Genetic resources, genetics and breeding, biotechnology, physiology, biochemistry, management of biotic and abiotic stresses, and nutrition of field crops, horticultural crops, livestock and fishes; agricultural meteorology, environmental sciences, forestry and agro forestry, agronomy, soils and soil management, microbiology, water management, agricultural engineering and technology, agricultural policy, agricultural economics, food nutrition, agricultural statistics, and extension research; impact of climate change and the emerging technologies on agriculture, and the role of agricultural research and innovation for development.
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