DD216159A1 - Means to influence plant growth and plant development - Google Patents

Abstract

The invention relates to agents for controlling plant growth and development processes, in particular for increasing tolerance to stress conditions. The agents according to the invention contain as active compounds of the general formula R-O-CH deep 2-CH deep 2-O R deep 1.

Description

Means for influencing plant growth and development

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Field of application of the invention

The invention relates to novel agents for regulating plant growth and development, in particular tolerance to stress conditions. .-'-.-

Characteristic of the known technical solutions,. '.

It is known that artificial regulators of plant metabolism and growth can attack at the various receptors and trigger different reactions depending on the level of development of the plant, the concentration and the form of preparation of the active substance. This results in very diverse applications. In this way it is possible to specifically promote or inhibit germination processes. In addition to general morphological changes of the plant, length and thickness growth can be controlled.

Furthermore, the vegetative and generative bud formation and the

Flowering process are affected. Not insignificant are applications of growth and metabolic regulators, which favorably influence the transport and storage properties and increase the persistence or tolerance to biological and abiotic factors.

For example, it is known that the administration of gibberellic acid as a natural phytohormone, in addition to other phytohormonal effects already described, also contributes to increasing the salt tolerance of plants. (M. Bakr Ahmed and co-workers, contrib. Trop. Subtrop., Agricultural and Tropical Veterinary Medicine, 8 (197o), 229, 3.3., Chandri, and others, Rajput, Pakistan, 3rd ed., Industr., 9 (1966), 260).

23M1983 * OS88t3

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A similar effect was also found for CCC (H.EL-Dämatry et al., Agrochimiges 8 (1964), 129). However, this effect does not seem to be manifest (F. Lanza and M. Onofrii, Sementi Elettu, Milanee 1, 1967, 314, T. El-Kobbra et al, a * Soil Sei, United Arab Rep 10 (1970), 249). From US-PS 3,357,130 and US-PS 3,357,132 a number of compounds of different structure are known, which contribute to an increased salt tolerance of crops.

However, the known agents have in their application a number of disadvantages such as limited reproducibility of the results, inadequate effect, complicated synthesis and are therefore assessed in their targeted application as uneconomical.

Aim of the invention

The aim of the invention is to propose means for increasing the tolerance of crop plants to stress conditions, in particular soil salinity, which do not have the deficiencies and disadvantages of the known agents.

Explanation of the essence of the invention

The invention has for its object to find »safer acting agents in their application, which can be economically produced cheaper.

The compositions according to the invention comprise the usual excipients and carriers as the active ingredient and at least one compound of the general formula

RO-CH ₂ -CH ₂ - 0 R ₁ or their acid addition products. Herein mean

R = _R ² ^ ^N -: R ² ^ C = N -: R ₁ O-CH ₂ -ON = CH J (CH ₂ J _n -CH = N-

R. = hydrogen. Alkyl, aryl, aralkyl, OCR, but also boric acid derivatives The alkyl or aryl radicals may optionally also be substituted,

Ry and R independently represent hydrogen, alkyl, aryl,

Aralkyl- or CCl-CH (OH) -, wherein the alkyl and aryl groups may optionally also be substituted,

- 3 - '' '

'. ; ^x ·. ''. '. ^ · '

R is alkyl, aryl or aralkyl-r, where the alkyl and aryl groups may optionally also be substituted,

and η can take values between 1 and 6.

The compositions according to the invention can be used in combination with crop protection and pesticides and / or agrochemicals

Exemplary embodiments

The following examples are intended to illustrate the invention without limiting it. The substances tested for their effect according to the invention, including their physical data, are listed in Table 1. Gibberelic acid (GS) was used as reference substance.

Table 1

Active substance structure - Kp ('C)

1 HO - Cl - L - CH 0 - N = CH - CH, Kp 67-68

2 HO-CH ₂ -CH ₂ -O-NH ₂ , Kp ₁ 61-62

Example 1 ' , .

Increasing salt tolerance in wheat - _;

To test the increase in tolerance of the plants to salted soil, wheat seeds (Triticum aestivum) of the variety "Hatri" were treated with the substances listed in Table 1 and cultured in sand with 0.2 % NaCl additive in a climatic chamber at 20 ° C. The evaluation took place after 9 days. The criterion of evaluation was seed number, mean shoot length, shoot size and root dry weight.

Table 2

Casserole of seedlings, shoot length, shoot and root dry mass wheat (relative values, control = 100 %)

Effort Seedling Amount (ppm)

control

(HO treated) 100

GS ^: 250 100

62.5 104

125 105

, 250 107

500 108

100

GS 250

· 62.5

/ '' \ 125 '

250

500

1000

significant differences over control

Sprout length (mm) Dry matter sprout root (g) (g) 100 100 100 141.8 141 ⁺⁺ 123.7 ⁺ 126 ⁺⁺ 133 ⁺⁺ 162 ⁺⁺⁺ 126 ' 124 ⁺⁺ 113 133 ⁺⁺ 104 107 135 ⁺⁺ 111 107 136 ⁺⁺ 90 99

114 112 108 114 IU ⁺ 116 * 112 ⁺ 125 ⁺ 107 12O ⁺ 119 ⁺⁺ _ +

- '-. - 5 -, .. ''. Example 2 Increasing the salt tolerance of barley

Sömmergerstensaätgut the variety "Mirena" was similar to Example 1 procedure. The criterion for the evaluation was medium run time, average shoot length, shoot size and root dry weight.

Table 3

Average casserole duration, shoot length, sprouts and root dry mass barley (relative values, control - 100 %)

, ι ' Effort amount (ppm) Run-up period (d) Sprout length (mm) Dry matter shoot root Cg) (g) 100 control , 96 (H ₂ O treated) 100 100 100 96 GS 250 91 329 ⁺⁺⁺ '197 ⁺⁺⁺ 98 1 62, 5 101 91 89 99 125 97 108 , 105 105 250 101 103 100 99 500 99 159 ⁺⁺⁺ 123 ⁺⁺ 1000 99 13I ⁺ 118 ⁺

Claims (2)

• - 6 ..-:;. , '. ; , Claim for invention - "- 1. A means for controlling plant growth and development processes, in particular the increase in the tolerance of crops to stress conditions such as salinization, characterized in that it is in addition to conventional excipients and carriers as the active ingredient at least one connec tion of the general formula or their acid addition products, in the R for N-; C = N- or R, O-CH-CH-O-N = CH- (CH) -CH = N- ^R 3 ^R 3 ι ·. stands, R = hydrogen, alkyl, aryl; Aralkyl-, OCR., Wherein the alkyl or aryl groups may optionally be substituted, but also embodies boric acid derivatives, R and R are independently hydrogen, alkyl, aryl, Aralkyl or CCl CH (OH) -, wherein the alkyl or aryl groups «J *, if necessary, can also be substituted, R represents alkyl, aryl or aralkyl groups, wherein the alkyl and aryl groups if necessary. can also be substituted, and η can take values between 1 and 6. 2. means for controlling plant growth and development processes according to item 1, characterized in that they are used in combination with pesticides and / or agrochemicals.