کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8886835 | 1628022 | 2018 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Far-red radiation and photosynthetic photon flux density independently regulate seedling growth but interactively regulate flowering
ترجمه فارسی عنوان
تابش پرتو فرابنفش و فتوسنتز فوتون شار حرارت به طور جداگانه تنظیم رشد نهال، اما تعاملی تنظیم
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
Red to far-red ratioDLIphytochrome photoequilibriumPFRPHYBPPEHPSPSILMAPSIIChlPPFDLEDs - LED هاDaily light integral - انتگرال نور روزانهLHC - برخورد دهنده بزرگ هادرون Photosynthetically active radiation - تابش فعال فتوسنتزیLeaf mass per area - توده برگ در هر منطقهPar - توسطLight-emitting diodes - دیودهای نوریChlorophyll - سبزینه یا کلروفیلRED - سرخphotosystem I - عکس سیستم منphotosynthetic photon flux density - فتوسنتز تراکم شار فوتونPhotosystem II - فتوسیستم 2Phytochrome - فیتوکرومphytochrome B - فیتوکروم BNet assimilation rate - میزان جذب خالصdry weight - وزن خشک
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی
Shade-avoidance responses can be triggered by a decrease in the red (R, 600-700â¯nm) to far-red (FR, 700-800â¯nm) radiation ratio, by a decrease in photosynthetic photon flux density (PPFD), or both. The effects of decreased PPFD on plant responses are often confounded with the effects of reduced blue (B, 400-500â¯nm) photon flux density, which is another signaling factor for shade-avoidance responses. We postulated that PPFD would not influence R:FR-mediated shade-avoidance responses if B photon flux density was constant. We grew seedlings of petunia (Petunia Ãhybrida), geranium (Pelargonium Ãhortorum), and coleus (Solenostemon scutellariodes) under three R:FR (1:0, 2:1, and 1:1) at two PPFDs (96 and 288â¯Î¼molâ¯m-2â¯s-1), all with a B photon flux density of 32â¯Î¼molâ¯m-2â¯s-1. As R:FR decreased, stem length in all species increased. Decreasing R:FR increased individual leaf area of petunia, and shoot dry weight of petunia and coleus. Increasing PPFD decreased chlorophyll concentration and increased leaf mass per area, net CO2 assimilation, whole-plant net assimilation, and dry weight in at least two species, independent of R:FR. In petunia, a long day plant, decreasing R:FR promoted subsequent flowering at both PPFDs, but to a greater extent under the lower PPFD. In day-neutral geranium, the addition of FR had no effect on flowering, irrespective of PPFD. We conclude that with a constant B photon flux density, decreases in R:FR promote stem elongation and leaf expansion, and subsequent dry mass accumulation, independent of PPFD. However, for flowering of long-day plant petunia, the promotive effect of low R:FR is greater under lower PPFD.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental and Experimental Botany - Volume 155, November 2018, Pages 206-216
Journal: Environmental and Experimental Botany - Volume 155, November 2018, Pages 206-216
نویسندگان
Yujin Park, Erik S. Runkle,