PHOTOMORPHOGENESIS AND PHOTOASSIMILATION IN SOYBEAN AND SORGHUM GROWN UNDER BROAD-SPECTRUM OR BLUE-DEFICIENT LIGHT-SOURCES
PHOTOMORPHOGENESIS AND PHOTOASSIMILATION IN SOYBEAN AND SORGHUM GROWN UNDER BROAD-SPECTRUM OR BLUE-DEFICIENT LIGHT-SOURCES
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DOI：
10.1104/pp.94.2.448
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发表时间：
1990-10-01
期刊：
影响因子：
7.4
通讯作者：
SAGER, JC
中科院分区：
文献类型：
--
作者：
BRITZ, SJ;SAGER, JC
以大豆（Glycine max [L.] Merr. CV.威廉姆斯）和高粱（Sorghum bicolor [L.] Moench cv Rio）在来自宽光谱日光荧光灯或蓝缺陷窄带（589纳米）低压钠（LPS）灯的相等光合光子通量（约500微摩尔/平方米/秒）下生长。播种后14 ~ 18天，光合作用和叶片生长与干物质积累的适应性可能有关。大豆在LPS光下的发育在几个方面与遮荫植物相似，这与蓝光光感受器在调节对辐照的生长反应中的重要作用一致。因此，LPS条件下的大豆将相对更多的生长分配给叶片，并保持较高的平均叶面积比（.hivin.L.hivin.A.hivin.R），以补偿较低的净同化率（.hivin.N.hivin.A.hivin.R）。因此，相对生长率与日光荧光灯下的植物相当。Hivin、N.hivin、A.hivin、R的减少与主要光合来源（第一三叶草酸）叶片的净光合速率（A）的降低相匹配。大豆中较低的A导致每单位叶面积的叶干物质减少，但高粱中在LP条件下较低的A与叶失绿和总氮减少相关（在大豆中未观察到）。尽管较低的A，.hivin.N.hivin.A.hivin.R在LPS条件下的高粱中较大，导致显著较大的相对生长速率（.hivin.L.hivin.A.hivin.R在两种光照条件下近似相等）。叶淀粉积累速率较高，这两个物种和淀粉含量在黑暗期结束时升高两个和三倍，分别为高粱和大豆，在LPS条件下。淀粉积累，叶片出口，植物生长响应光谱质量之间的可能关系被认为是。
The role of blue light in plant growth and development was investigated in soybean (Glycine max [L.] Merr. cv. Williams) and sorghum (Sorghum bicolor [L.] Moench. cv Rio) grown under equal photosynthetic photon fluxes (.apprxeq.500 micromoles per square meter per second) from broad spectrum daylight fluorescent or blue-deficient, narrow-band (589 nanometers) low pressure sodium (LPS) lamps. Between 14 and 18 days after sowing, it was possible to relate adaptations in photosynthesis and leaf growth to dry matter accumulation. Soybean development under LPS light was similar in several respects to that of shaded plants, consistent with an important role for blue light photoreceptors in regulation of growth response to irradiance. Thus, soybeans from LPS conditions partitioned relatively more growth to leaves and maintained higher average leaf area ratios (.hivin.L.hivin.A.hivin.R) that compensated lower net assimilation rates (.hivin.N.hivin.A.hivin.R). Relative growth rates were therefore comparable to plants from daylight fluorescent lamps. Reductions in .hivin.N.hivin.A.hivin.R were matched by lower rates of net photosynthesis (A) on an area basis in the major photosynthetic source (first trifolliolate) leaf. Lower A in soybean resulted from reduced leaf dry matter per unit leaf area, but lower A under LPs conditions in sorghum correlated with leaf chlorosis and reduced total nitrogen (not observed in soybean). In spite of a lower A, .hivin.N.hivin.A.hivin.R was larger in sorghum from LPS conditions, resulting in significantly greater relative growth rates (.hivin.L.hivin.A.hivin.R was approximately equal for both light conditions). Leaf starch accumulation rate was higher for both species and starch content at the end of the dark period was elevated two- and three-fold for sorghum and soybean, respectively, under LPS conditions. Possible relations between starch accumulation, leaf export, and plant growth in response to spectral quality were considered.