STOMATAL DENSITY AND APERTURE LENGTH IN 4 PLANT-SPECIES GROWN ACROSS A SUBAMBIENT CO2 GRADIENT
STOMATAL DENSITY AND APERTURE LENGTH IN 4 PLANT-SPECIES GROWN ACROSS A SUBAMBIENT CO2 GRADIENT
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DOI：
10.2307/2445670
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发表时间：
1993-12-01
影响因子：
3
通讯作者：
POLLEY, HW
中科院分区：
文献类型：
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作者：
MALONE, SR;MAYEUX, HS;POLLEY, HW
以一年生C3农艺禾本科燕麦为材料，测定了其叶片气孔密度、气孔开度、叶面积和气孔数（Avena sativa）和小麦（Triticum aestivum），C3木本豆科蜂蜜牧豆树（Prosopis glandulosa），多年生C4禾草小偃麦草（Schizachyrium scoparium）在生长室中在接近200至350 μ mol/mol的低于环境的二氧化碳浓度（[CO2]）梯度下生长。其目的是确定气孔的大小和密度是否会在生长过程中对大气[CO2]产生变化，在亚环境[CO2]范围内代表自上一次冰河时代以来发生的加倍。气孔密度和孔径长度的变化随着[CO2]的增加是小的检测时。小麦旗叶近轴面气孔密度随CO2浓度的增加而减小，气孔长度随CO2浓度的增加而略有增加。两个小麦品种的叶面积和气孔/旗叶数的增加与[CO2]的比例相似。没有一致的关系[CO2]和气孔密度或大小被检测到牧豆树，燕麦，或小蓝茎。我们的结论是，这些物种的个体植物缺乏可塑性，显着改变气孔密度和孔径长度，以增加大气[CO2]在一个单一的世代（一年生植物）或生长季节（多年生植物）。
Stomatal density, stomatal aperture length, area/leaf, and number of stomata/leaf were measured after the annual C3 agronomic grasses oats (Avena sativa) and wheat (Triticum aestivum), the C3 woody legume honey mesquite (Prosopis glandulosa), and the perennial C4 grass little bluestem (Schizachyrium scoparium) were grown across a subambient carbon dioxide concentration ([CO2]) gradient from near 200 to 350 mumol/mol in a growth chamber. The purpose was to determine if the size and density of stomata vary in response to atmospheric [CO2] during growth, across a subambient [CO2] range representative of the doubling that has occurred since the last ice age. Changes in stomatal density and aperture length with increasing [CO2] were small when detected. Stomatal density decreased on adaxial flag leaf surfaces of wheat, and aperture length increased slightly with [CO2]. Leaf area and number of stomata/flag leaf increased by similar proportions with [CO2] in two wheat cultivars. No consistent relationship between [CO2] and stomatal density or size was detected in mesquite, oats, or little bluestem. We conclude that individual plants of these species lack the plasticity to significantly alter stomatal density and aperture length in response to increasing atmospheric [CO2] in a single generation (annuals) or growing season (perennials).