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List and explain the stages of growth and development of sorghum

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The development of sorghum is in three stages namely;
1.stage I: This is the period from germination to conversion of apical meristem from vegetative to a reproductive stage
2.Growth stage II: The period of development of the plant from panicle initiation to flowering. This stage represents 1/3 of total development time. In this stage, leaf area and root extension attain maximum values and thus 60-70% of total dry weight is accumulated. This stage ends with extension of inflorescence from the whorl and the onset of pollination
3.Growth stage III:
This is the grain filling period from flowering to physiological maturity of the grains during which time leaf area declines.
-Any stress which hampers the normal progress of events in growth stage II can have effect on yield through reduction in plant size (That is root and leaf area) and number of seeds per head.
-The lower seed number results either directly or indirectly on the reduced photosynthetic activities.
-Moisture stress seems to have most adverse effect on yield when it occurs during booting or heading when the plant water requirement is at its maximum.
-Moisture stress experienced earlier than booting or heading stage at the flower differentiation delays flowering and reduces flower number. This also reduces the number of seeds/head.
-Under non-stressed condition, dry matter accumulation by grains is largely a function of current photosynthesis by the flag leaf and the upper four leaves.
-Under severe water stress, when the whole plant photosynthetic activity declines the relative contribution of the panicle to grain filling increases.
-It has been demonstrated that moisture stress experienced just before heading results in increase in hydrocyanic acid content of the ratoon of certain sorghum and can be formed in amounts that become poisonous to livestock feeding in sorghum.

Titany answered the question on August 16, 2021 at 08:42

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List and explain the stages of growth and development of sorghum

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