因此，当瓜类植物的根在雨水浸湿的土壤中时，它们的光合作用率低于通常水平。
It follows that melon plants have a lower-than-usual rate of photosynthesis when their roots are in rain-soaked soil.
植物的祖先是进行光合作用的单细胞生物，由此产生的植物可能缺乏真正的根、茎、叶和复杂的生殖结构，如花朵。
The ancestors of plants were photosynthetic single-celled organisms that gave rise to plants presumably lacked true roots, stems, leaves, and complex reproductive structures such as flowers.
研究了根域体积限制对日光温室基质栽培黄瓜生长及光合特性的影响。
The effect of root restriction on the growth and photosynthetic characteristics of cucumber in solar greenhouse was studied .
探讨根外喷硼与土壤施硼对植株硼形态含量及叶片光合作用的影响。
Effects of applied boron (soil application of boron, spraying boron on the plant) on the boron forms and leaf photosynthesis of papaya plants were investigated.
水稻的光合作用及报分泌能力影响根际固氮活性。
The photosynthetic rate and excretory ability affected the nitrogenase activity in the rhizosphere.
研究低温胁迫下自根及两种嫁接幼苗叶片光合作用及叶绿素荧光参数的变化。
The effects of low temperature stress on photosynthesis and chlorophyll fluorescence parameters in leaves of own-rooted and grafted Watermelon Seedling have been studied.
利用水培试验，研究了剪根等处理后水稻群体光合速率的动态变化。
The effects of wiping out roots on rice canopy apparent photosynthetic rate (CAP) after heading were studied with solution experiments.
表明控制性分根交替滴灌(adi)能在不牺牲作物光合产物积累的前提下提高玉米的水分利用效率。
It suggested that ADI could improve the water use efficiency without sacrificing the accumulation of biomass.
绿色植物叶进行光合作用制造有机物，通过茎的韧皮部向下运输供给根的需要。
The organic matters were produced through photosynthesis by the leaves of the green plants and were transported down to meet the need of root through the bast of the stem.
结果表明，分根交替灌溉可增强烟株的根系活力，保持较高的光合速率，降低蒸腾速率，提高叶片瞬时水分利用效率；
The results indicated that root-divided alternative irrigation could increase root activities, photosynthesis rate and water use efficiency of tobacco leaf, but decrease transpiration rate;
促根壮苗，增加叶绿素，提高光合效率。
Promote root seedlings, increased chlorophyll and photosynthetic efficiency.
促根壮苗，增加叶绿素，提高光合效率。
Promote root seedlings, increased chlorophyll and photosynthetic efficiency.
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