Faster leaf senescence after flowering in wet direct‐seeded rice was mainly regulated by decrease in cytokinin content as compared with transplanted‐flooded rice

Liu, Hongyan; He, Aibin; Jiang, Guanglei; Hussain, Saddam; Wang, Weiqin; Sun, Hong; Min, Jiyoung

doi:10.1002/fes3.232

Cited by 11 publications

(3 citation statements)

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“…A more significant accumulation of photosynthetic matter (dry matter mass) can be achieved using higher planting densities at different stages. Similar results were reported by Liu et al [25], who reported a more substantial photosynthetic capacity of rice individuals. In the present study, the dry matter at the MS stage of N2B3 treatment was higher.…”

Section: Discussionsupporting

confidence: 91%

Enhancing Rice Yield and Nitrogen Utilization Efficiency through Optimal Planting Density and Reduced Nitrogen Rates

Hai-jun

Tian

Sun³

et al. 2023

Agronomy

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Rice yields can only be achieved by selecting a high-quality population. Nitrogen rates and transplanting density play a significant role in determining population quality and yield. Field experiments were conducted in Heshan District, Hunan Province, China, to explore suitable nitrogen rates and appropriate transplanting densities for rice production in 2021 and 2022. In this study, three levels of nitrogen, e.g., N1, N2, and N3 (0, 150, and 210) kg ha−1, and three transplanting densities, e.g., B1, B2, and B3 (1, 2, and 3) seedlings per hill were used to study their individual or combined effects on rice (Taiyou 390) population quality, yield, and yield components, nitrogen-related enzyme activities, and nitrogen absorption and utilization efficiency. The results showed that N2B3 had the highest yield, with an average yield of 9.30 t ha−1 in two years, which was 3.7~49.6% higher than other treatments. This increase was attributed to higher dry matter accumulation (1538.22 g m−2) and effective panicle number (435.2 × 104 ha−1), influenced by increased nitrate reductase activity at the booting stage and glutamine synthase at the heading stage, along with maintenance of higher SPAD value and leaf area index. Nitrogen rates and transplanting densities significantly affected nitrogen use efficiency, with the contribution rate of nitrogen fertilizer to yield decreasing as nitrogen rates increased. However, N2B3 improved nitrogen use efficiency and stabilized rice yield by reducing nitrogen fertilizer application. This study suggested that N2B3 treatment could enhance rice yield by improving plant nitrogen use efficiency under low nitrogen supplementation.

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Section: Discussionsupporting

confidence: 91%

Enhancing Rice Yield and Nitrogen Utilization Efficiency through Optimal Planting Density and Reduced Nitrogen Rates

Hai-jun

Tian

Sun³

et al. 2023

Agronomy

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“…This phenomenon is also reported to occur in tomato plants [28]. Furthermore, Liu et al [29] found that faster leaf aging after the plant began to bloom was mainly due to a decrease in the cytokinin content of the leaves. The last two findings justified that senescence of the older leaves in L. acutangula plants was associated with flowering and fruiting activities.…”

Section: Resultsmentioning

confidence: 58%

Morphological Characteristics and Growth Behavior of Ridge Gourd [Luffa acutangula (L.) Roxb.] in Tropical Urban Ecosystem

Lakitan

Rizar²,

Muda³

2022

J.Trop Life Science

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Ridge gourd (Luffa acutangula) is a climbing vegetable that produces edible fruits. Young fruits are harvested at a time when the seed coats have been established, but cotyledons have not yet formed. This study covered morphological characteristics, growth behavior, and cultivation practices suitable for increasing the production of the ridge gourd in urban ecosystems. Results of observation revealed the heart-shaped leaf of the ridge gourd was very uniform, and the leaf surface was flat so that their leaf area could be accurately estimated using leaf length and/or width (R2 > 0.97). Yet, leaf thickness was not a reliable predictor for the leaf area (R2 < 0.34). The length of petioles was not correlated with the leaf blade area. All single leaves, multiple tendrils, an inflorescence of male flowers and/or a single female flower, and a branch could be formed at each stem node. Water content in the leaf blade was lower than in the petiole. This phenomenon is related to water favor loss due to transpiration activity. Nevertheless, the total conserved water within the leaf blade was 6.26 times more than those within the petiole. The process of fruit enlargement followed the Sigmoid curve. The upper end of the curve started to flatten 10 days after the female flower bloomed. Moreover, at the age of 10 days, cotyledon has not yet formed, so it can be used as a guide to determine the harvest time of the gourd ridge fruit. Based on the leaf SPAD value, by the time the fruit began to enlarge, 4-5 leaves at the stem base were instigated to show symptoms of senescence. Ridge gourd fruit fresh weight can be best estimated using the length × diameter of the plants as a predictor. Keywords: Climbing vegetable, Fruit age, Leaf shape, Sigmoid curve, Urban olericulture

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“…The relationship between leaf Chl concentrations and SPAD-502 values has been demonstrated (Minolta 1989, Süß et al 2015. This device has been used to measure the leaf Chl concentration in Prunus virginiana L., Viburnum lentago L., Oryza sativa L., and Arabidopsis thaliana (Ling et al 2011, Donnelly et al 2020, Liu et al 2020. For each species, it is necessary to derive a calibration curve with the SPAD value and its corresponding Chl content (Li et al 2017, Primka andSmith 2019).…”

Section: Introductionmentioning

confidence: 99%

Chlorophyll measurements in Alstroemeria sp. using SPAD-502 meterand the color space CIE Lab*, and its validation in foliar senescence

et al. 2022

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A -absorbance; AIC -Akaike information criterion; Chl -chlorophyll; CI -color index; CIE -Commission internationale de l'éclairage; LED -light-emitting diode; R 2 -coefficient of determination; SPAD -Soil plant analysis development. Acknowledgments: The first author was granted a Ph.D. scholarship by the Mexican Council of Science and Technology (CONACyT). We also thank the grower company COXFLOR for the flowers supply.

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Faster leaf senescence after flowering in wet direct‐seeded rice was mainly regulated by decrease in cytokinin content as compared with transplanted‐flooded rice

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 11 publications

References 50 publications

Enhancing Rice Yield and Nitrogen Utilization Efficiency through Optimal Planting Density and Reduced Nitrogen Rates

Enhancing Rice Yield and Nitrogen Utilization Efficiency through Optimal Planting Density and Reduced Nitrogen Rates

Morphological Characteristics and Growth Behavior of Ridge Gourd [Luffa acutangula (L.) Roxb.] in Tropical Urban Ecosystem

Chlorophyll measurements in Alstroemeria sp. using SPAD-502 meterand the color space CIE Lab*, and its validation in foliar senescence

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Faster leaf senescence after flowering in wet direct‐seeded rice was mainly regulated by decrease in cytokinin content as compared with transplanted‐flooded rice

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 11 publications

References 50 publications

Enhancing Rice Yield and Nitrogen Utilization Efficiency through Optimal Planting Density and Reduced Nitrogen Rates

Enhancing Rice Yield and Nitrogen Utilization Efficiency through Optimal Planting Density and Reduced Nitrogen Rates

Morphological Characteristics and Growth Behavior of Ridge Gourd [Luffa acutangula (L.) Roxb.] in Tropical Urban Ecosystem

Chlorophyll measurements in Alstroemeria sp. using SPAD-502 meterand the color space CIE L*a*b*, and its validation in foliar senescence

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Product

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Chlorophyll measurements in Alstroemeria sp. using SPAD-502 meterand the color space CIE Lab*, and its validation in foliar senescence