K ( superscript + ) and proline are the main osmotic regulation substances and the main antioxidant enzymes are superoxide dismutase ( sod ) and peroxidase ( pod ) in maize 玉米以k (上标+ )和脯氨酸为主要渗透调节物质，以超氧化物歧化酶( sod )和过氧化物酶( pod )为主要抗氧化酶。
Jasmonic acid and its derivative methyl jasmonate , collectively called jasmonates , are phyto - regulators existing widely in plants and playing an important role in plant cells 摘要茉莉酸及其衍生物茉莉酸甲酯等统称为茉莉酸盐，是广泛存在于植物中的一种生长调节物质，在植物细胞中起着非常重要的作用。
The reasons of strong salt resistance had three aspects : ( 1 ) wheatgrass could reduce the potentiality penetration in cell by increasing the osmoregulatotory substance , so the plants could absorb more water by roots 得出冰草植株耐盐有三个原因： 1 、冰草植株能够增加可溶性渗透调节物质，以降低细胞渗透势，保持植株根系吸水。
Under middle level drought condition mosuchun can increase content of soluble organic osmoticum ( pro , amino add and sugars ) maintain or raise the activity of sod and cat , and decrease permeability of plasma and content of mda 在干旱条件下摩素淳能增加游离氨基酸、可溶性糖和脯氨酸3种有机渗透调节物质的含量，维持或提高sod和cat活性，降低膜相对透性和mda含量，防止或降低了膜脂过氧化作用对膜的伤害。
The callus was induced and proliferated using young leave as explant , which comes out at early spring . in this paper , the author discussed the induction effect and the proliferation effect by using different kinds of hormone and different physical - chemical factors 本文以山茶初春新生枝条的幼叶为外植体，采用不同的培养基，探讨了不同的植物生长调节物质对愈伤组织的诱导和不同的理化因子对愈伤组织的增殖效应。
( 1 ) wheatgrass could remove the active oxygen by heightening the activity of the enzymes and protect the plants from damage at light stress . ( 2 ) wheatgrass could keep turgor pressure by osmoregulation and flexibility of cells to maintain plants developing in drought stress , some osmregulatory substance , such as the proline and the soluble sugar , increased 2 、冰草植株在渗透胁迫条件下会增加渗透调节物质如脯氨酸、可溶性糖类以降低细胞渗透势，使其在高渗溶液中仍能够保持一定水分的吸收，植株能够维持生命活动。
Secondly , this paper studied the effect of different concentration nacl on wheatgrass and pointed out that the wheatgrass could maintain well - balanced physiology at light salt stress , but at high salt stress , the membrane penetrability increased , fresh weight reduced , the development was restrained distinctly , and the osmoregulatory substance increased notably , at last the plants perished . from these results , this paper concluded that the wheatgrass had strong salt resistance 二、用不同浓度的nacl (氯化钠)溶液对冰草植株进行根际渗透胁迫发现，冰草在低盐浓度胁迫下能够保持正常的生理代谢，而高浓度盐胁迫下植株质膜透性增大，鲜重减少，生长明显受到抑制，有机渗透调节物质显著增加，长时间胁迫植株死亡。
Abstract : focusing on such aspects as natural drugs , natural pesticides , growth and ecologic regulators , natural dependence drugs and total synthesis of natural organic compounds , this paper reviews some compounds with greater social significance or academic value , and aims to see in perspective the developmental process of the natural organic compounds with bioactivity , a constant hot research field , and its significance in human life 文摘:本文从天然药物、天然农药、生长及生态调节物质、精神依赖药物和全合成等几个方面，通过评论一些有较大社会意义或学术价值的化合物，试图透视具有生理活性天然有机化合物这一常盛不衰的热点研究领域的发展脉络，及对人类生活的意义。
