负向光性

水稻根的负向光性及其影响因素

Negative Phototropism of Rice Root and Its Influencing Factors

生长素在水稻根负向光性反应中的作用

Effects of Indole Acetic Acid ( IAA ) on the Negative Phototropism of Rice Root

在不同的环境因子作用下，稻根的负向光性有明显的差异。

Affected by various environmental factors , the rice root has different negative phototropic curvature .

推测稻根负向光性的光受体可能为蓝光受体。

It suggested that the blue light receptor might be the photoreceptor for the negative phototropism in rice root .

与对照相比，盐处理增加了根尖皮层细胞中小液泡的数目，较高的盐胁迫下，稻根不再具有负向光性。

Compared with the control the number of small and medium-sized vacuoles was increased in root tip cortical cells .

对根冠遮光而给根尖其他部分照光时，稻根不发生负向光性反应。

If root cap was shaded when the root was irradiated , the root showed no negative phototropism'And the root lost the characteristics of negative phototropism when root cap was divested completely .

剥除根冠而保留根尖的分生区和伸长区时，根能生长但失去负向光性，保留根冠的原始细胞时，当根冠重新长出时，又恢复负向光性生长。

Rice root could resume the characteristic of negative phototropism when the new root cap grew up , if the original cells of root cap were well protected while root cap was divested .

稻根负向光性与地上部分的生长无关，在将地上部分切除后，地上部分仍然能够表现出负向光性反应的特性。

The negative phototropism of rice root had nothing to do with the upper part of rice , when the upper part of rice was cut , the root can show the characteristics of negative phototropism with little influence .

这些结果为进一步认识花生果针与荚果发育的分子调控机制提供证据，同时也为研究植物向重力性、负向光性、向触性等生理现象的调控机制提供新线索。

These results provide evidence for the molecular mechanism of development of peanut fruit-needle and pod , also provide new clues for the study of regulatory mechanism of physiological phenomena , such as plant gravitropism , negative phototropism and thigmotropism .

本研究以扬稻6号为实验材料，应用水培法和气培法开展光照、温度、水分、激素和化学因素等环境因子对稻根生长发育和负向光性的研究。

Our research use " Yangdaoliuhao " as the material and adopted water-culture and air-culture method to explore the influence of environmental factors such as light , temperature , water , hormones and chemical factors on the growth and development and negative phototropism of rice root .